Fireworks are primarily made of charcoal (solid carbon) that causes them to explode. A firework technician would need a knowledge of which branch of chemistry?

• organic chemistry

• biochemistry

• analytic chemistry

• inorganic chemistry

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is an example of quantitative data?

• miles

• hot

• red

• 8 minutes

Your weather app reports the actual temperature as 34°F but the temperature on the thermometer outside is 35°F. What is the percent error of the recorded temperature (absolute error = ±1°F)?

• 0.029%

• 0.29%

• 2.9%

• 29%

Which of these is a well-supported description of a specific relationship under given conditions in nature?

• procedure

• law

• hypothesis

• theory

Tags

NGSS.MS-PS2-4

A student spends 4.5 hours studying for a test. How much time is this equivalent to in seconds?

• 16,200 seconds

• 2,700 seconds

• 270 seconds

• 6,480 seconds

Which statements are true about matter? Select all that apply.

• Matter cannot be measured.

• Matter must be visible.

• Matter takes up space.

Tags

NGSS.5-PS1-1

NGSS.5-PS1-3

Maggie read that some plants grow better if the soil is acidic. She puts potting soil in two planting containers and transplants two of her geraniums that seem about the same size into the pots. She puts the pots in the same location so that they both get the same amount of sunlight each day and are at the same temperature. She also makes sure they get the same amount of water. However, Maggie puts a tablespoon of vinegar, a household acid, in the water she gives to one of the plants. She measures the growth of the plants every week for five weeks and records the results in a data table. Which of the following is the independent/manipulated variable in the experiment?

• the growth of the plants

• the sunlight

• the length of time for the experiment

• the acidity of the water

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which of the following measurements are recorded to three significant figures? Select all that apply.

• 140 g

• 1, 610 s

• 0.003 L

• 0.0890 m

A scientist has an idea that he wants to test in an experiment. Which term BEST describes his idea?

• investigation

• hypothesis

• method

What is an SI unit of mass?

• kilogram

• ounce

• newton

• pound