8th Grade Science

Front

What is a change of state?

Back

A change of state is a physical change where a substance transitions from one state of matter to another, such as solid to liquid or liquid to gas.

Front

Can mixtures be separated using physical means?

Back

Yes, mixtures can be separated using physical means such as filtration, evaporation, or distillation.

Front

Which planets can be seen from Earth without a telescope?

Back

Venus, Mars, and Jupiter are the planets visible from Earth without using a telescope.

Front

What is tap water that contains iron, magnesium, calcium, and other metals classified as?

Back

Tap water containing these substances is classified as a mixture.

Front

What is the correct equation for photosynthesis?

Back

The correct equation for photosynthesis is CO₂ + light + H₂O → O₂ + Sugar.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the process of photosynthesis?

Back

Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen.

Front

What are the three states of matter?

Back

The three states of matter are solid, liquid, and gas.