Gr 8 Natural Sciences Ch 1.1: Photosynthesis

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

The Sun (correct)

Starch

Chemical potential energy

Glucose

What is the green pigment in plants that absorbs light energy for photosynthesis?

Glucose

Chlorophyll (correct)

Pigment

Chloroplast

Where does photosynthesis occur in plant cells?

In the leaves and stems

In the chlorophyll

In the chloroplasts (correct)

In the roots

What is the process by which plants convert light energy into chemical energy stored in glucose?

Photosynthesis Signup and view all the answers

What is the form of energy stored in the chemical bonds of glucose?

Chemical potential energy Signup and view all the answers

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

Respiration 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 Signup and view all the answers

What is the characteristics of starch in water?

Insoluble Signup and view all the answers

What is the energy source required for photosynthesis?

Sunlight Signup and view all the answers

What is the primary function of glucose produced during photosynthesis?

Energy release Signup and view all the answers

What is the insoluble compound that glucose can be converted into for long-term storage?

Starch Signup and view all the answers

What is the indicator that confirms glucose has been produced and stored during photosynthesis?

Presence of starch Signup and view all the answers

What happens to iodine when it comes into contact with starch?

It turns from brownish-orange to dark blue-black Signup and view all the answers

What is a characteristic of starch?

It is insoluble in water and not sweet Signup and view all the answers

What role does the Sun's heat energy play in photosynthesis?

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

What is the immediate use of glucose produced during photosynthesis in plants?

To release energy for growth and maintenance through respiration Signup and view all the answers

What is the primary function of chloroplasts in plant cells?

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

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

Plants convert radiant energy into chemical potential energy Signup and view all the answers

Which of the following compounds is sweet-tasting and soluble in water?

Glucose Signup and view all the answers

What is the result of the conversion of light energy into chemical energy during photosynthesis?

Production of glucose Signup and view all the answers

What is the purpose of testing for the presence of starch in plants?

To validate the occurrence of photosynthesis Signup and view all the answers

What is the significance of iodine turning from brownish-orange to dark blue-black?

It shows the presence of starch in plant tissues Signup and view all the answers

Why is it necessary for plants to convert glucose into starch?

To store glucose for long-term energy storage Signup and view all the answers

What is the outcome of converting glucose into starch?

Glucose becomes insoluble and not sweet-tasting Signup and view all the answers

What is the significance of chlorophyll in plant cells?

It absorbs light energy for photosynthesis Signup and view all the answers

What is the primary role of glucose in living organisms?

To act as a source of energy Signup and view all the answers

What is the role of glucose in plant growth and reproduction?

It is converted into various chemicals for growth and reproduction Signup and view all the answers

What is the relationship between photosynthesis and respiration?

Photosynthesis produces energy for respiration Signup and view all the answers

What is the ultimate source of energy for the production of glucose in photosynthesis?

Radiant energy from the Sun Signup and view all the answers

What is the role of chlorophyll in photosynthesis?

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

What is the relationship between light energy and chemical potential energy in photosynthesis?

Light energy is converted into chemical potential energy Signup and view all the answers

What is the purpose of storing glucose as starch in plant cells?

To store energy for long-term use Signup and view all the answers

What is the primary function of chloroplasts in plant cells?

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

Why is photosynthesis essential for life on Earth?

Because it converts light energy into chemical energy Signup and view all the answers

What is the significance of glucose produced during photosynthesis?

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

How does radiant energy from the Sun contribute to photosynthesis?

It provides light energy for photosynthesis Signup and view all the answers

What is the equation for photosynthesis?

Carbon dioxide + Water → Glucose + Oxygen Signup and view all the answers

What is the purpose of starch in plants?

To store energy for long-term use Signup and view all the answers

What is the primary function of glucose in plants?

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

What is the result of testing for starch in plants?

Iodine turns from brownish-orange to dark blue-black Signup and view all the answers

What is the relationship between glucose and starch?

Glucose is soluble and starch is insoluble Signup and view all the answers

What is the significance of chlorophyll in photosynthesis?

It absorbs light energy from the Sun Signup and view all the answers

What is the primary reason why plants convert glucose into starch?

To store energy for long-term use Signup and view all the answers

What is the chemical property that allows iodine to detect starch in plant tissues?

Color change from brownish-orange to dark blue-black Signup and view all the answers

What is the primary benefit of storing glucose as starch in plant cells?

Insolubility in water for long-term storage Signup and view all the answers

What is the chemical compound that serves as an indicator of photosynthesis in plants?

Starch Signup and view all the answers

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

Release energy for growth and maintenance Signup and view all the answers

What is the primary reason why plants undergo photosynthesis?

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

What is the primary reason why plants convert light energy into chemical energy?

To store energy in the form of chemical bonds Signup and view all the answers

Which of the following processes is NOT directly dependent on radiant energy from the Sun?

Respiration Signup and view all the answers

What is the significance of chlorophyll in plant cells?

It absorbs light energy for photosynthesis Signup and view all the answers

What is the ultimate source of energy for the production of glucose in photosynthesis?

The Sun Signup and view all the answers

What is the primary difference between glucose and starch?

Glucose is soluble in water, while starch is insoluble Signup and view all the answers

What is the significance of the chloroplasts in plant cells?

They are the site of photosynthesis Signup and view all the answers

What is the result of the conversion of light energy into chemical energy during photosynthesis?

The storage of energy in the form of chemical bonds Signup and view all the answers

Why is photosynthesis essential for life on Earth?

It is the primary source of energy for all living organisms Signup and view all the answers

Gr 8 Natural Sciences Ch 1.1: Photosynthesis

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Questions and Answers

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

What is the green pigment in plants that absorbs light energy for photosynthesis?

Where does photosynthesis occur in plant cells?

What is the process by which plants convert light energy into chemical energy stored in glucose?

What is the form of energy stored in the chemical bonds of glucose?

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 characteristics of starch in water?

What is the energy source required for photosynthesis?

What is the primary function of glucose produced during photosynthesis?

What is the insoluble compound that glucose can be converted into for long-term storage?

What is the indicator that confirms glucose has been produced and stored during photosynthesis?

What happens to iodine when it comes into contact with starch?

What is a characteristic of starch?

What role does the Sun's heat energy play in photosynthesis?

What is the immediate use of glucose produced during photosynthesis in plants?

What is the primary function of chloroplasts in plant cells?

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

Which of the following compounds is sweet-tasting and soluble in water?

What is the result of the conversion of light energy into chemical energy during photosynthesis?

What is the purpose of testing for the presence of starch in plants?

What is the significance of iodine turning from brownish-orange to dark blue-black?

Why is it necessary for plants to convert glucose into starch?

What is the outcome of converting glucose into starch?

What is the significance of chlorophyll in plant cells?

What is the primary role of glucose in living organisms?

What is the role of glucose in plant growth and reproduction?

What is the relationship between photosynthesis and respiration?

What is the ultimate source of energy for the production of glucose in photosynthesis?

What is the role of chlorophyll in photosynthesis?

What is the relationship between light energy and chemical potential energy in photosynthesis?

What is the purpose of storing glucose as starch in plant cells?

What is the primary function of chloroplasts in plant cells?

Why is photosynthesis essential for life on Earth?

What is the significance of glucose produced during photosynthesis?

How does radiant energy from the Sun contribute to photosynthesis?

What is the equation for photosynthesis?

What is the purpose of starch in plants?

What is the primary function of glucose in plants?

What is the result of testing for starch in plants?

What is the relationship between glucose and starch?

What is the significance of chlorophyll in photosynthesis?

What is the primary reason why plants convert glucose into starch?

What is the chemical property that allows iodine to detect starch in plant tissues?

What is the primary benefit of storing glucose as starch in plant cells?

What is the chemical compound that serves as an indicator of photosynthesis in plants?

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

What is the primary reason why plants undergo photosynthesis?

What is the primary reason why plants convert light energy into chemical energy?

Which of the following processes is NOT directly dependent on radiant energy from the Sun?

What is the significance of chlorophyll in plant cells?

What is the ultimate source of energy for the production of glucose in photosynthesis?

What is the primary difference between glucose and starch?

What is the significance of the chloroplasts in plant cells?

What is the result of the conversion of light energy into chemical energy during photosynthesis?

Why is photosynthesis essential for life on Earth?

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