Grade 7 Science Diagnostic Exam

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1 / 25

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

To provide a framework and support for the body.

To transport oxygen and nutrients to cells.

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

To break down food and absorb nutrients.

2 / 25

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

Evaporation

Precipitation

Condensation

Transpiration

3 / 25

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

It results in the formation of a new substance.

It describes how a substance reacts with other substances.

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

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

4 / 25

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

There is no difference; the terms are interchangeable.

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

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

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

5 / 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 a larger and hotter star than any other star in the universe.

It is the only star that produces its own light.

It is much closer to Earth than any other star.

6 / 25

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

Glucose

Oxygen

Water

Carbon dioxide

7 / 25

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

A thermometer

A graduated cylinder

A weighing scale

A ruler

8 / 25

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

Energy can be created and destroyed.

Energy can be created but not destroyed.

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

Energy can be destroyed but not created.

9 / 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?

Sedimentary rock

Metamorphic rock

Igneous rock

Magma

10 / 25

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

An organism that eats other animals.

An organism that breaks down dead organic matter.

An organism that makes its own food.

An organism that eats only plants.

11 / 25

How is the speed of an object calculated?

Time divided by distance.

Mass multiplied by acceleration.

Distance multiplied by time.

Distance divided by time.

12 / 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.

13 / 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.

14 / 25

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

To exchange oxygen and carbon dioxide with the air.

To digest food and absorb nutrients.

To pump blood throughout the body.

To filter waste products from the blood.

15 / 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 layer where all weather phenomena occur.

It is the outermost layer of the atmosphere.

It contains the ionosphere, which reflects radio waves.

16 / 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.

17 / 25

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

Animal cells have a nucleus, but 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.

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

18 / 25

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

Plasma

Solid

Liquid

Gas

19 / 25

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

A rock

A plant

A lion

A mushroom

20 / 25

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

Inner core

Crust

Outer core

Mantle

21 / 25

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

Omnivore

Herbivore

Producer

Carnivore

22 / 25

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

To chew food

To absorb water and minerals

To break down food using acid and enzymes

To pump blood

23 / 25

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

To filter blood.

To digest food.

To exchange oxygen and carbon dioxide.

To pump blood.

24 / 25

Which component of an atom carries a positive charge?

Proton

Neutron

Electron

Nucleus

25 / 25

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

Heat traveling along a metal spoon placed in hot soup.

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.

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Grade 7 Science Diagnostic Exam

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