Chemistry Unit Review

Fill in the blank: _______ is an example of a chemical reaction.

• A) Burning fireworks

• B) Melting ice

• C) Mixing Kool-Aid with water

Which of the following is NOT a chemical reaction?

• A) Baking a cake

• B) Melting ice

• C) Burning fireworks

• D) Burning Paper

Fill in the blank: Baking a cake is considered a _______.

• A) Chemical Reaction

• B) Physical Change

What happens to metal over a long period of time when it is exposed to the environment?

• It melts

• It rusts

• It evaporates

• It freezes

Which of the following is a chemical change?

• Cutting an apple

• Breaking a glass

• Boiling an egg

• Tearing a piece of paper

Which of the following statements describe chemical reactions? Select THREE that apply.

• Dissolving sugar in iced tea to make sweet tea.

• Cooking pancakes on a griddle.

• Two clear solutions, lead nitrate and potassium iodide, are combined and a yellow solid forms.

• A beaker feels cool to the touch after vinegar and baking soda are mixed in it.

• Water mixed with red drink mix forms a red liquid.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is LESS dense than water?

• the glass

• the tablets

• the bubbles

Tags

NGSS.MS-PS1-2

Changes in which one or more new substance is formed are called

• phases of matter

• chemical changes

• physical changes

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Rust is a form of oxidation. This is what type of change?

• Physcial

• Chemical

Is frying an egg a physical or chemical change?

• chemical
• physical