Chemical Reactions Review

Front

What evidence demonstrates that a chemical change has occurred when vinegar and baking soda are combined?

Back

A gas is formed.

Front

Which processes from the table can be used as evidence to identify the formation of a new substance? Options: Processes A, B, C, and D; Processes B, C, E, and F; Processes B, C, D, and F; Processes C, D, E, and F

Back

Processes B, C, E, and F

Front

If a chemical reaction is EXOTHERMIC, the temperature would...

Back

Increase

Front

An ice pack is an example of: exothermic, endothermic, both, none

Back

endothermic

Front

During an endothermic reaction in a beaker, if we are part of the surroundings and touched the beaker, it would feel _______.

Back

Cold

Front

Which of the following is NOT an example of a physical change? Options: crumpled paper, pencil sharpening, shrunken clothing, rust

Back

rust

Front

Which of the following is a sign that a chemical reaction has occurred? Options: change in shape, melting, formation of a gas, dissolving

Back

formation of a gas

Front

Which of the following is an example of a physical change?

• Burning wood in a campfire.
• A bicycle rusting when it is left outside.
• A chainsaw cutting down a tree.
• Cooking an egg on the stove.

Back

A chainsaw cutting down a tree.

Front

How do you know that setting off a firework is a chemical change?

Back

It releases gas and creates heat and light.

Front

Is digesting your food a physical or chemical change?

Back

Chemical