7th Grade Semester Test Review

Front

Why are asteroids irregularly shaped instead of being spherical?

Back

Asteroids are irregularly shaped due to their small size and weak gravity.

Front

What is the solvent in a Kool-aid mixture made of sugar, Kool-aid powder, and water?

Back

Water is the solvent.

Front

How does increasing the surface area of a solid solute affect its rate of dissolution in an aqueous solution?

Back

It increases the rate of dissolution.

Front

What happens to magma when it reaches the ocean?

Back

Magma cools and solidifies into rock, potentially forming new landforms.

Front

In a tug of war, if one person pulls with 55 N to the right and another with 65 N to the left, what is the net force?

Back

10 N, to the left.

Front

What is the definition of a solvent?

Back

A solvent is a substance that dissolves a solute, resulting in a solution.

Front

What is the definition of dissolution?

Back

Dissolution is the process of a solute dissolving in a solvent.

Front

What is the relationship between surface area and dissolution rate?

Back

Increasing surface area increases the rate of dissolution.

Front

What is magma?

Back

Magma is molten rock located beneath the Earth's surface.

Front

What is the difference between magma and lava?

Back

Magma is underground; lava is magma that has reached the Earth's surface.