Science: Module 1 Lessons 13-17

A reaction that occurs when heating or mixing substances produces a new substances is called a _________________.

• chemical reaction

• mixture

• solution

Tags

NGSS.MS-PS1-2

Mrs. Farrell mixed 20 grams of baking soda and 30 grams of vinegar and noticed bubbles forming. After the bubbles settled, she weighed the mixture and noticed it weighed 47.5 grams instead of 50 grams. Why do you think this happened?

• A lot of the mixture spilled out of the container.

• Gas from the bubbles escaped into the air

• Some of the vinegar disappeared

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What are three examples of a chemical reaction?

• dissolving salt

• burning paper

• baking cupcakes

• melting the wax of a candle

• bubbles forming when mixing baking soda and vinegar

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When one substance is completely mixed into another substance, it is said to have been ___________.

• changed

• mixed

• dissolved

• disappeared

What type of mixture is formed when water and salt are combined?

• solution

• new substance

• chemical reaction

• particle

Which of the following is an example of a substance dissolving?

• melting a candle

• burning bread

• freezing water

• koolaid into water

Tags

NGSS.MS-PS1-2

When oil and water are mixed, what happens?
Choose 2 answers.

• a new substance is formed

• a new substance is not formed

• the substances mix

• the substances stay separated

• a chemical reaction occurs

A combination of two or more substances that keep their own properties when mixed is known as a ____________.

• compound

• solution

• mixture

• chemical reaction

What happens to the weight of a mixture when a gas is released during a chemical reaction?

• The weight increases.

• The weight decreases.

• The weight remains the same.

• The weight doubles.

Tags

NGSS.MS-PS1-5

Which of the following is NOT a characteristic of a chemical reaction?

• Formation of a new substance

• Change in temperature

• Substances retain their original properties

• Production of gas

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5