Grade 7 Science Diagnostic Exam

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1 / 25

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

Producer

Omnivore

Herbivore

Carnivore

2 / 25

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

There is no difference; the terms are interchangeable.

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

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

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

3 / 25

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

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.

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

4 / 25

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

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

It contains the ionosphere, which reflects radio waves.

It is the outermost layer of the atmosphere.

It is the layer where all weather phenomena occur.

5 / 25

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

An organism that breaks down dead organic matter.

An organism that eats only plants.

An organism that eats other animals.

An organism that makes its own food.

6 / 25

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

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

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

The process by which a plant makes its own food.

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

7 / 25

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

A lion

A plant

A rock

A mushroom

8 / 25

How is the speed of an object calculated?

Distance divided by time.

Mass multiplied by acceleration.

Distance multiplied by time.

Time divided by distance.

9 / 25

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

To produce proteins.

To produce energy for the cell.

To control all cell activities.

To store genetic information.

10 / 25

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

Tearing a piece of paper.

Melting an ice cube into water.

Dissolving salt in water.

Burning a piece of wood.

11 / 25

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

Inner core

Crust

Outer core

Mantle

12 / 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

13 / 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.

14 / 25

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

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

Energy can be created but not destroyed.

Energy can be destroyed but not created.

Energy can be created and destroyed.

15 / 25

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

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

To break down food and absorb nutrients.

To transport oxygen and nutrients to cells.

To provide a framework and support for the body.

16 / 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?

Metamorphic rock

Magma

Igneous rock

Sedimentary rock

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 are much smaller than animal cells.

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.

18 / 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.

Touching a hot stove and feeling the heat.

The Sun's rays warming the Earth.

19 / 25

Which component of an atom carries a positive charge?

Proton

Neutron

Nucleus

Electron

20 / 25

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

Transpiration

Condensation

Precipitation

Evaporation

21 / 25

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

Liquid

Solid

Plasma

Gas

22 / 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 much closer to Earth than any other star.

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

It is the only star that produces its own light.

23 / 25

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

A weighing scale

A graduated cylinder

A ruler

A thermometer

24 / 25

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

To digest food and absorb nutrients.

To pump blood throughout the body.

To exchange oxygen and carbon dioxide with the air.

To filter waste products from the blood.

25 / 25

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

Water

Oxygen

Glucose

Carbon dioxide

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Grade 7 Science Diagnostic Exam

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