2024 EOYE: Science

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Which characteristic of living beings involves the ability to react to changes in the environment?

Nutrition

Sensitivity (correct)

Excretion

Growth

What is the primary function of the chloroplast in a plant cell?

Provide energy through photosynthesis (correct)

Facilitate cell division

Store water and waste

Control cell movement

Which of the following organelles is unique to plant cells and provides structural support?

Cell wall (correct)

Vacuole

Nucleus

Mitochondria

How do animal cells differ from plant cells in terms of vacuoles?

Plant cells have larger vacuoles (B) Signup and view all the answers

What process do living organisms use to obtain energy for growth and movement?

Respiration (A) Signup and view all the answers

What is the main role of the mitochondria in a cell?

Provide energy through respiration (C) Signup and view all the answers

Which of the following statements is true regarding the shape of plant and animal cells?

Plant cells are regular in shape and larger (C) Signup and view all the answers

Why must living organisms carry out excretion?

To remove potentially poisonous waste (C) Signup and view all the answers

What is the primary reason plant cells have a cell wall?

To provide structure and strength (A) Signup and view all the answers

Why do animal cells lack a large vacuole compared to plant cells?

They have different storage organs (A) Signup and view all the answers

How do you calculate the total magnification of a microscope?

By multiplying the magnification of the eyepiece and objective lens (A) Signup and view all the answers

What role do chemical stains play when preparing microscope slides?

They darken transparent cell structures for visibility (C) Signup and view all the answers

What is a potential issue when laying the coverslip on the specimen?

It might trap air bubbles (C) Signup and view all the answers

Why is it important to handle the coverslip by the sides only?

To prevent contamination with oils from fingers (B) Signup and view all the answers

What might occur if the highest objective lens is used before adjusting to lower magnifications?

The specimen will be more difficult to locate (A) Signup and view all the answers

What is the function of the stage clip on a microscope?

To hold the slide in place (A) Signup and view all the answers

What type of energy is stored in the bonds between atoms in substances like petrol and food?

Chemical Potential Energy (B) Signup and view all the answers

Which of the following is an example of kinetic energy?

A moving car (A) Signup and view all the answers

What is the process called when energy changes from one form to another?

Energy Transformation (C) Signup and view all the answers

Which of the following energy types is caused by the movement of atoms?

Heat Energy (D) Signup and view all the answers

What does the Law of Conservation of Energy state?

Energy can be transformed but not created or destroyed. (D) Signup and view all the answers

How is energy efficiency calculated?

Useful energy output divided by total energy input times 100. (B) Signup and view all the answers

What type of energy is involved when a ball rolls down a hill?

Gravitational Potential Energy transforming into Kinetic Energy (C) Signup and view all the answers

What is sound energy produced by?

Vibrating objects (D) Signup and view all the answers

What process describes the movement of air freshener particles spreading out in a room?

Diffusion (D) Signup and view all the answers

Why was it easy to compress air in the syringe?

Air particles have a spread out structure. (A) Signup and view all the answers

What happens to the gaps between particles in the metal ball when it is heated?

The gaps expand. (B) Signup and view all the answers

What type of energy is associated with the motion of particles?

Active Energy (B) Signup and view all the answers

Which statement is true about compressing water in a syringe?

It sprays out due to the high density. (A) Signup and view all the answers

What happens to the size of a helium balloon over time due to particle size?

It gets smaller as more helium particles escape due to their small size. (C) Signup and view all the answers

What indicates that wood particles have little space between them?

Wood cannot be compressed effectively. (C) Signup and view all the answers

What occurs when a heated metal ball cools down?

The gaps between particles contract. (C) Signup and view all the answers

What did the addition of 50 ml of meths to 50 ml of water illustrate about the arrangement of particles?

Some meth particles fit into the gaps between the water particles. (D) Signup and view all the answers

Which statement correctly describes potential energy?

Stored energy based on an object's position. (B) Signup and view all the answers

How do particles in hot water behave compared to those in cold water regarding diffusion?

Particles in hot water diffuse faster because they gain energy. (D) Signup and view all the answers

What conclusion can be drawn about the mass of gas particles when they escape from a balloon?

The mass decreases as more smaller particles leave the balloon. (C) Signup and view all the answers

What impact does temperature have on the speed of particles in a solution?

Higher temperatures increase the speed of particles by providing more energy. (D) Signup and view all the answers

How does the size of particles affect the ability to escape from a container?

Smaller particles escape more readily due to their size. (D) Signup and view all the answers

What does the addition of potassium permanganate crystals to hot water reveal about particle behavior?

Particles in hot water dissolve and diffuse quickly due to increased energy. (C) Signup and view all the answers

What misconception might one have about the behavior of air fresheners when sprayed in the air?

Air fresheners spread quickly because the particles gain energy from the surroundings. (D) Signup and view all the answers