Unit 1 Practice Questions

A hypothesis is _____

• an observation recorded from an experiment

• a proposed explanation for what is observed

• a summary of the results of many experiments

• a well-tested explanation for many observations

Allison conducted an experiment to determine the effect of temperature of germination of flower seeds. Which variable is the LEAST important to control in this experiment?

• The temperature the flower seeds were heated.

• The length of time the seeds were heated.

• The type of soil used.

• The amount of moisture in the soil.

Tags

NGSS.MS-LS1-5

The following are types of graphs used in science:

• Bar, line, and pie graphs

• Only bar graphs

• Only scatter plots

• Only pie charts

Tags

NGSS.MS-PS3-1

Jose wants to know how acid rain affects plant growth. Jose reads science journals about acid rain and plant growth. He thinks acid rain will cause the plants to grow slower. In Container A he puts 80 mL of distilled water and 20 mL of vinegar. In Container B he puts 100 mL of distilled water. He puts four bean plants in the window in his room. He gives those four bean plants 10 mL from Container A every other day. He puts four bean plants in the kitchen window. He gives the plants in the kitchen window 10 mL of water from Container B every other day. After measuring the plants for two weeks, he notes the plants in his room grew 5 cm taller. Jose concludes that the plants that got Container A water grew taller.

• The bedroom window

• The kitchen window

• Container A

• Container B

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Jose wants to know how acid rain affects plant growth. Jose reads science journals about acid rain and plant growth. He thinks acid rain will cause the plants to grow slower. In Container A he puts 80 mL of distilled water and 20 mL of vinegar. In Container B he puts 100 mL of distilled water. He puts four bean plants in the window in his room. He gives those four bean plants 10 mL from Container A every other day. He puts four bean plants in the kitchen window. He gives the plants in the kitchen window 10 mL of water from Container B every other day. After measuring the plants for two weeks, he notes the plants in his room grew 5 cm taller. Jose concludes that the plants that got Container A water grew taller.

• Vinegar is a pollutant that will kill plants.

• Acid rain will slow the growth of plants.

• Bean plants do not need much water.

• Acid rain will not affect the growth of plants.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Jose wants to know how acid rain affects plant growth. Jose reads science journals about acid rain and plant growth. He thinks acid rain will cause the plants to grow slower. In Container A he puts 80 mL of distilled water and 20 mL of vinegar. In Container B he puts 100 mL of distilled water. He puts four bean plants in the window in his room. He gives those four bean plants 10 mL from Container A every other day. He puts four bean plants in the kitchen window. He gives the plants in the kitchen window 10 mL of water from Container B every other day. After measuring the plants for two weeks, he notes the plants in his room grew 5 cm taller. Jose concludes that the plants that got Container A water grew taller.

• Vinegar is not an acid.

• The windows may have a different amount of light.

• Bean plants do not need much water to grow.

• He needs four more plants and a Container C with more vinegar.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Jacynthia weighs 144 lbs. How many newtons does she weigh if 1 lb = 4.45 N?

• 32.4 N

• 78.1 N

• 590. N

• 641 N

The steps for completing problems for dimensional analysis are:

• Identify the given and required units, set up conversion factors, and solve the problem.

• Guess the answer and check if it fits.

• Ignore units and focus only on numbers.

• Use only one conversion factor regardless of the problem.

What SI unit is used to measure length?

• kilogram

• ampere

• second

• meter

Benny converts 5943 cm to meters. How many meters would that be?

• 59.43 m

• 594.3 m

• 5.943 m

• 0.5943 m