Gr 8 Natural Sciences Ch 1.1 SUM: Photosynthesis and Respiration

What is the primary source of energy for sustaining life on Earth?

Radioactive energy
Chemical potential energy
The Sun's radiant energy (correct)
Glucose

What is the function of chlorophyll in plants?

To release oxygen
To absorb light energy (correct)
To regulate temperature
To store glucose

Where does photosynthesis occur in plant cells?

Nucleus
Cell wall
Chloroplasts (correct)
Mitochondria

What is the product of photosynthesis that serves as a primary energy source for living organisms?

Glucose (B) Signup and view all the answers

What is the term for energy stored within chemical bonds?

Chemical potential energy (C) Signup and view all the answers

What is the process by which organisms release energy from food?

Respiration (D) Signup and view all the answers

What is the term for a substance that gives color to plant tissues and is involved in photosynthesis?

Pigment (C) Signup and view all the answers

What is the storage form of glucose in plants that is insoluble in water?

Starch (A) Signup and view all the answers

What is the primary source of energy for the process of photosynthesis?

Sunlight (B) Signup and view all the answers

What is the role of glucose produced during photosynthesis?

All of the above (D) Signup and view all the answers

What is the purpose of the iodine test in photosynthesis?

To confirm the presence of starch, an indicator of glucose production (D) Signup and view all the answers

What is the primary difference between starch and glucose?

Glucose is insoluble in water, while starch is also insoluble (A) Signup and view all the answers

What is the purpose of respiration in organisms?

To release energy from food for life processes (C) Signup and view all the answers

What are the primary reactants for respiration?

Glucose and oxygen (A) Signup and view all the answers

What is the by-product of respiration that is expelled through exhalation in humans?

Carbon dioxide (A) Signup and view all the answers

What is the purpose of the limewater test?

To test for the presence of carbon dioxide (D) Signup and view all the answers

What is the equation for respiration?

Glucose + Oxygen → Carbon Dioxide + Water + Energy (D) Signup and view all the answers

What is the term for the solution used to test for the presence of carbon dioxide?

Limewater (D) Signup and view all the answers

What is the primary function of glucose produced during photosynthesis?

To provide energy for growth and maintenance (D) Signup and view all the answers

Which of the following is a characteristic of starch?

Insoluble in water (D) Signup and view all the answers

What is the purpose of the iodine test in photosynthesis?

To detect the presence of starch (C) Signup and view all the answers

What is the by-product of respiration that is released into the atmosphere?

Carbon dioxide (A) Signup and view all the answers

What is the role of chlorophyll in the process of photosynthesis?

To absorb light energy from the Sun (B) Signup and view all the answers

What is the term for the process by which cells break down glucose to release energy?

Respiration (A) Signup and view all the answers

What is the purpose of limewater in detecting carbon dioxide?

To detect the presence of carbon dioxide (D) Signup and view all the answers

What is the primary source of energy for the process of respiration?

Glucose (A) Signup and view all the answers

What is the role of oxygen in the process of respiration?

To accept electrons during energy release (A) Signup and view all the answers

What is the purpose of glucose in plant cells?

To release energy for growth and maintenance (A) Signup and view all the answers

What is the primary mechanism by which plants harness energy from the Sun?

Converting light energy into chemical energy (C) Signup and view all the answers

What is the significance of chloroplasts in plant cells?

They are the site of photosynthesis (A) Signup and view all the answers

What is the result of the conversion of radiant energy into chemical potential energy?

Formation of glucose (D) Signup and view all the answers

Which of the following is a characteristic of glucose?

It is a primary energy source for living organisms (A) Signup and view all the answers

What is the relationship between light energy and heat energy from the Sun?

Heat energy affects the environment, while light energy is used for photosynthesis (D) Signup and view all the answers

What is the primary function of chlorophyll in plants?

To absorb light energy for photosynthesis (A) Signup and view all the answers

What is the significance of radiant energy from the Sun?

It is converted into chemical potential energy (B) Signup and view all the answers

What is the role of plants in the energy cycle of life on Earth?

To convert light energy into chemical energy (B) Signup and view all the answers

What is the primary function of chloroplasts in plant cells?

To convert light energy into chemical energy (D) Signup and view all the answers

What is the characteristic of starch in plants?

It is insoluble in water (D) Signup and view all the answers

What is the relationship between radiant energy and chemical potential energy?

Radiant energy is converted into chemical potential energy during photosynthesis (D) Signup and view all the answers

What is the role of plants in the energy cycle of life on Earth?

To convert light energy into chemical energy through photosynthesis (C) Signup and view all the answers

What is the significance of the Sun's energy for life on Earth?

It provides radiant energy for photosynthesis (D) Signup and view all the answers

What is the characteristic of glucose in plants?

It is a storage form of energy in plants (B) Signup and view all the answers

What is the role of the Sun's heat energy in the environment?

It affects the overall environment in which plants grow (C) Signup and view all the answers

What is the result of the conversion of radiant energy into chemical potential energy?

The storage of glucose in plants (B) Signup and view all the answers

What is the essential role of chlorophyll in the process of photosynthesis?

To absorb light energy from the Sun (C) Signup and view all the answers

What is the primary purpose of storing glucose as starch in plants?

For long-term storage in various plant parts (A) Signup and view all the answers

What is the biochemical process by which cells release energy from glucose?

Respiration (A) Signup and view all the answers

What is the significance of the limewater test in detecting carbon dioxide?

It indicates the presence of carbon dioxide (D) Signup and view all the answers

What is the primary function of glucose produced during photosynthesis?

To provide energy for immediate growth (B) Signup and view all the answers

What is the relationship between glucose and starch in plants?

Glucose is stored as starch (C) Signup and view all the answers

What is the primary difference between glucose and starch?

Glucose is soluble, while starch is insoluble (A) Signup and view all the answers

What is the purpose of testing for starch in plants?

To confirm the occurrence of photosynthesis (A) Signup and view all the answers

What is the primary role of oxygen in the process of respiration?

To release energy from glucose (D) Signup and view all the answers

What is the significance of the iodine test in detecting glucose?

It indicates the presence of glucose (D) Signup and view all the answers

What is the primary difference between the way plants and other organisms utilize energy from the Sun?

Plants convert light energy into chemical energy, while other organisms use heat energy directly. (A) Signup and view all the answers

What is the role of chloroplasts in plant cells?

To convert light energy into chemical energy (B) Signup and view all the answers

What is the relationship between radiant energy and chemical potential energy?

Radiant energy is converted into chemical potential energy during photosynthesis (D) Signup and view all the answers

What is the significance of plants in the energy cycle of life on Earth?

They are the primary producers of energy (C) Signup and view all the answers

What is the purpose of storing glucose as starch in plants?

To store energy for later use (D) Signup and view all the answers

What is the role of chlorophyll in the process of photosynthesis?

To absorb light energy and transfer it to other molecules (D) Signup and view all the answers

What is the biochemical process by which cells release energy from glucose?

Respiration (A) Signup and view all the answers

What is the relationship between light energy and heat energy from the Sun?

Light energy is used directly for photosynthesis, while heat energy is used to regulate the environment (A) Signup and view all the answers

What is the primary function of chlorophyll in the process of photosynthesis?

To absorb light energy from the Sun (A) Signup and view all the answers

Which of the following is NOT a characteristic of starch?

Soluble in water (B) Signup and view all the answers

What is the primary purpose of the iodine test in photosynthesis?

To detect the presence of starch (B) Signup and view all the answers

What is the primary function of respiration in organisms?

To break down glucose to release energy (B) Signup and view all the answers

What is the by-product of respiration that is expelled through exhalation in humans?

Carbon dioxide (C) Signup and view all the answers

What is the purpose of limewater in detecting carbon dioxide?

To detect the presence of carbon dioxide (C) Signup and view all the answers

What is the primary source of energy for the process of respiration?

Glucose (D) Signup and view all the answers

What is the role of oxygen in the process of respiration?

To release energy from glucose (D) Signup and view all the answers

What is the primary function of glucose produced during photosynthesis?

To serve as food for the plant (C) Signup and view all the answers

What is the result of the conversion of radiant energy into chemical potential energy?

The synthesis of glucose from carbon dioxide and water (A) Signup and view all the answers

What is the primary function of glucose produced during photosynthesis in plants?

To release energy for growth and maintenance (B) Signup and view all the answers

What is the role of oxygen in the process of respiration?

To release energy from glucose (C) Signup and view all the answers

What is the purpose of the limewater test?

To detect the presence of carbon dioxide (B) Signup and view all the answers

What is the characteristic of starch in plants?

Insoluble in water and not sweet-tasting (C) Signup and view all the answers

What is the by-product of respiration that is released into the atmosphere?

Carbon dioxide (C) Signup and view all the answers

Gr 8 Natural Sciences Ch 1.1 SUM: Photosynthesis and Respiration

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Questions and Answers

What is the primary source of energy for sustaining life on Earth?

What is the function of chlorophyll in plants?

Where does photosynthesis occur in plant cells?

What is the product of photosynthesis that serves as a primary energy source for living organisms?

What is the term for energy stored within chemical bonds?

What is the process by which organisms release energy from food?

What is the term for a substance that gives color to plant tissues and is involved in photosynthesis?

What is the storage form of glucose in plants that is insoluble in water?

What is the primary source of energy for the process of photosynthesis?

What is the role of glucose produced during photosynthesis?

What is the purpose of the iodine test in photosynthesis?

What is the primary difference between starch and glucose?

What is the purpose of respiration in organisms?

What are the primary reactants for respiration?

What is the by-product of respiration that is expelled through exhalation in humans?

What is the purpose of the limewater test?

What is the equation for respiration?

What is the term for the solution used to test for the presence of carbon dioxide?

What is the primary function of glucose produced during photosynthesis?

Which of the following is a characteristic of starch?

What is the purpose of the iodine test in photosynthesis?

What is the by-product of respiration that is released into the atmosphere?

What is the role of chlorophyll in the process of photosynthesis?

What is the term for the process by which cells break down glucose to release energy?

What is the purpose of limewater in detecting carbon dioxide?

What is the primary source of energy for the process of respiration?

What is the role of oxygen in the process of respiration?

What is the purpose of glucose in plant cells?

What is the primary mechanism by which plants harness energy from the Sun?

What is the significance of chloroplasts in plant cells?

What is the result of the conversion of radiant energy into chemical potential energy?

Which of the following is a characteristic of glucose?

What is the relationship between light energy and heat energy from the Sun?

What is the primary function of chlorophyll in plants?

What is the significance of radiant energy from the Sun?

What is the role of plants in the energy cycle of life on Earth?

What is the primary function of chloroplasts in plant cells?

What is the characteristic of starch in plants?

What is the relationship between radiant energy and chemical potential energy?

What is the role of plants in the energy cycle of life on Earth?

What is the significance of the Sun's energy for life on Earth?

What is the characteristic of glucose in plants?

What is the role of the Sun's heat energy in the environment?

What is the result of the conversion of radiant energy into chemical potential energy?

What is the essential role of chlorophyll in the process of photosynthesis?

What is the primary purpose of storing glucose as starch in plants?

What is the biochemical process by which cells release energy from glucose?

What is the significance of the limewater test in detecting carbon dioxide?

What is the primary function of glucose produced during photosynthesis?

What is the relationship between glucose and starch in plants?

What is the primary difference between glucose and starch?

What is the purpose of testing for starch in plants?

What is the primary role of oxygen in the process of respiration?

What is the significance of the iodine test in detecting glucose?

What is the primary difference between the way plants and other organisms utilize energy from the Sun?

What is the role of chloroplasts in plant cells?

What is the relationship between radiant energy and chemical potential energy?

What is the significance of plants in the energy cycle of life on Earth?

What is the purpose of storing glucose as starch in plants?

What is the role of chlorophyll in the process of photosynthesis?

What is the biochemical process by which cells release energy from glucose?

What is the relationship between light energy and heat energy from the Sun?

What is the primary function of chlorophyll in the process of photosynthesis?

Which of the following is NOT a characteristic of starch?

What is the primary purpose of the iodine test in photosynthesis?

What is the primary function of respiration in organisms?

What is the by-product of respiration that is expelled through exhalation in humans?

What is the purpose of limewater in detecting carbon dioxide?

What is the primary source of energy for the process of respiration?

What is the role of oxygen in the process of respiration?

What is the primary function of glucose produced during photosynthesis?

What is the result of the conversion of radiant energy into chemical potential energy?

What is the primary function of glucose produced during photosynthesis in plants?

What is the role of oxygen in the process of respiration?

What is the purpose of the limewater test?

What is the characteristic of starch in plants?