You Be The Chemist

Experiment to determine if sugar dissolves faster in warm or cold water. What is the dependent variable?

• The temperature of the water

• The rate at which the sugar dissolves

• The amount of water in the cups

• The brand of sugar used

Tags

NGSS.MS-PS3-4

Which of the following changes in temperature is equivalent to a 10° C increase?

• A 10° F increase

• An 18°F increase

• A 12°F increase

• A 50°F increase

Which of the following statements is true of elements in the same row of the periodic table?

• They do not react with one another

• They have the same number of electron shells

• They have the same number of electrons in their outer shells

• They tend to participate in the same types of reactions

In which of the following situations does a 2kg ball have the greatest potential energy?

• At the start of a fall from a height of 2m

• Halfway through a fall from a height of 2m

• Halfway through a fall from a height of 4m

• Both at the start from 2m and halfway from 4m

Tags

NGSS.MS-PS3-2

Which of the following processes is an example of condensation?

• Nitrogen gas changing to liquid nitrogen

• Dry ice changing to gaseous carbon dioxide

• Hydrochloric acid changing to hydrogen chloride gas

• Water vapor changing to ice

Tags

NGSS.MS-PS1-4

Which of the following statements is true of liquids?

• They have a defined volume

• They have a defined shape

• They have both a defined volume and shape

• None of the above

Tags

NGSS.MS-PS1-4

Which of the following occurs when water is heated?

• It dissociates into oxygen and hydrogen B

• Its molecules become more attracted to one another

• Its molecules form a crystalline structure

• Its molecules move at a faster rate

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Scientific inquiry usually begins with

• a question

• an idea

• an observation

• a theory

Tags

NGSS.HS-PS1-3

Scientists state clearly what they plan to test during their experiment. This statement is

• an inference

• a scientific theory

• an experiment

• a hypothesis

Tags

NGSS.MS-PS2-2

Pieces of information collected before, during, and after an experiment

• research

• interviews

• data

• investigation

Tags

NGSS.MS-PS3-4

NGSS.MS-PS1-2