7th Grade Life Science Midterm Exam

7th Grade Life Science Midterm Exam

Multiple Choice

A _____ holds its shape and does not take the shape of its container.

• solid

• liquid

• gas

• plasma

Multiple Choice

A _____ has no visible shape and fills its container.

• solid

• liquid

• gas

• plasma

Multiple Choice

A _____ flows and can take the shape of its container.

• solid

• liquid

• gas

• plasma

Multiple Choice

A _____ keeps its shape because its molecules only move in place, not around each other.

• solid

• liquid

• gas

• plasma

Multiple Choice

A _____ can flow because its molecules move around, not away from each other.

• solid

• liquid

• gas

• plasma

Multiple Choice

A _____ does not have a visible shape because its molecules can move away from each other.

• solid

• liquid

• gas

• plasma

Multiple Choice

When _____ is transferred to or from a substance, it can change the molecules’ freedom of movement.

• change

• energy

• freedom of movement

• air

Multiple Choice

Different substances have different _____.

• substances

• energy

• properties

• shapes

Open Ended

Why do different substances have different properties?

Multiple Choice

During a _____ reaction, one or more substances (reactants) change into one or more different substances (products).

• physical

• chemical

• phase change

• temperature change

Multiple Choice

During a _____ reaction, a new substance is not formed.

• physical

• chemical

• phase

• temperature

Multiple Choice

A _____ change alters the appearance of a material, but a new substance is not formed.

• physical

• chemical

• phase

• temperature

Multiple Choice

All of these are an example of a physical change except:

• Rust on a car

• A broken glass

• Cracking an egg

• Mixing salt and pepper

Multiple Choice

All of these are an example of a chemical change except:

• Baking a cake

• Wood burning

• Mixing skittles and m&m’s

• Digesting food

Multiple Select

Circle all of the evidence of a chemical reaction

• Temperature change (increase/decrease)

• Bubbles forming

• End products are a different color than the reactants

• Change in texture (frying an egg)

Multiple Choice

Baking a cake is a ____

• chemical change

• physical change

Multiple Choice

Mixing salt and pepper is a

• chemical change

• physicla change

Multiple Choice

Cracking an egg is a ___

• physical change

• chemical change

Multiple Choice

A car rusting is a ___

• physical change

• chemical change

Multiple Choice

What does the Law of Conservation of Matter state?

• That matter cannot be created or destroyed

• That matter can be made or taken away.