Grade 7 Science Diagnostic Exam

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1 / 25

What is the difference between **weather** and **climate**?

Weather describes short-term atmospheric conditions, while climate describes long-term weather patterns.

Weather is affected by the Sun, but climate is not.

There is no difference; the terms are interchangeable.

Climate is studied by meteorologists, while weather is studied by climatologists.

2 / 25

The **Law of Conservation of Energy** states that:

Energy can be created but not destroyed.

Energy can be destroyed but not created.

Energy can be created and destroyed.

Energy cannot be created or destroyed, but can be converted from one form to another.

3 / 25

What is the process called when **water vapor turns into liquid water**?

Precipitation

Condensation

Evaporation

Transpiration

4 / 25

Which component of an atom carries a positive charge?

Neutron

Nucleus

Electron

Proton

5 / 25

What is the function of the **ribosome** in a cell?

To produce energy for the cell.

To store genetic information.

To control all cell activities.

To produce proteins.

6 / 25

Which layer of the Earth is a solid, metallic sphere at the center?

Mantle

Crust

Inner core

Outer core

7 / 25

The **rock cycle** describes the continuous process of how rocks change. What type of rock is formed from compacted layers of sand and silt?

Igneous rock

Sedimentary rock

Magma

Metamorphic rock

8 / 25

How is the speed of an object calculated?

Mass multiplied by acceleration.

Distance divided by time.

Distance multiplied by time.

Time divided by distance.

9 / 25

A student wants to measure the volume of an irregularly shaped rock. Which tool should they use?

A weighing scale

A ruler

A graduated cylinder

A thermometer

10 / 25

Which state of matter has a **definite shape and definite volume**?

Solid

Plasma

Gas

Liquid

11 / 25

What is the function of the stomach in the digestive system?

To break down food using acid and enzymes

To pump blood

To absorb water and minerals

To chew food

12 / 25

In a food chain, what is the role of a **producer**?

An organism that breaks down dead organic matter.

An organism that eats other animals.

An organism that makes its own food.

An organism that eats only plants.

13 / 25

Why does the Sun appear so much larger and brighter than other stars?

It reflects light from the other stars, making it appear brighter.

It is the only star that produces its own light.

It is a larger and hotter star than any other star in the universe.

It is much closer to Earth than any other star.

14 / 25

Which of the following is a characteristic of a **physical property** of matter?

It can be observed or measured without changing the substance's chemical composition.

It describes how a substance reacts with other substances.

It can only be observed by changing the substance's chemical identity.

It results in the formation of a new substance.

15 / 25

Which of the following is the best example of a **chemical change**?

Melting an ice cube into water.

Burning a piece of wood.

Dissolving salt in water.

Tearing a piece of paper.

16 / 25

Which of the following describes a characteristic of the **troposphere**?

It contains the ozone layer that protects Earth from ultraviolet radiation.

It is the outermost layer of the atmosphere.

It contains the ionosphere, which reflects radio waves.

It is the layer where all weather phenomena occur.

17 / 25

In a food web, what is the term for an organism that consumes both plants and animals?

Herbivore

Producer

Carnivore

Omnivore

18 / 25

What is the primary product of **photosynthesis** that provides energy for the plant?

Glucose

Carbon dioxide

Oxygen

Water

19 / 25

Which of the following is an example of an **abiotic factor** in an ecosystem?

A plant

A lion

A rock

A mushroom

20 / 25

What is the main difference between a **plant cell** and an **animal cell**?

Animal cells have a nucleus, but plant cells do not.

Animal cells have a large central vacuole, while plant cells do not.

Plant cells have a cell wall and chloroplasts, which animal cells do not.

Plant cells are much smaller than animal cells.

21 / 25

What is the primary role of the **heart** in the human circulatory system?

To digest food and absorb nutrients.

To filter waste products from the blood.

To exchange oxygen and carbon dioxide with the air.

To pump blood throughout the body.

22 / 25

Which of the following is an example of **convection**?

The rising of hot air and the sinking of cooler air.

The Sun's rays warming the Earth.

Touching a hot stove and feeling the heat.

Heat traveling along a metal spoon placed in hot soup.

23 / 25

What is the main role of the **lungs** in the human body?

To exchange oxygen and carbon dioxide.

To pump blood.

To filter blood.

To digest food.

24 / 25

What is the main function of the **nervous system** in the human body?

To break down food and absorb nutrients.

To provide a framework and support for the body.

To coordinate the body's actions and transmit signals between different parts.

To transport oxygen and nutrients to cells.

25 / 25

Which of the following describes the process of **meiosis**?

A process of cell division that results in two identical daughter cells.

A type of cell division that produces four genetically different daughter cells with half the number of chromosomes.

The process of a cell growing and developing before it divides.

The process by which a plant makes its own food.

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Grade 7 Science Diagnostic Exam

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