Post-Assessment

Students are investigating what will happen to the boiling point of water (normally about 100°C) when adding salt or sugar to the water. Students set up three beakers of water on hot plates. In one beaker they put 500 mL of pure water. In the second beaker they add 100 g of salt to 500 mL of water and stir. In the third beaker, they add 100 g of sugar to 500 mL of water and stir. They turn the hot plates on and record the temperature of when the water in each beaker begins to boil. Which statement is an appropriate hypothesis for this investigation?

• Adding salt or sugar to water will cause the boiling point of water to decrease.

• The amount of sugar and salt added to the water will effect the results.

• If the pure water is frozen it will freeze faster than the salt or sugar water.

• Because sugar and salt look similar they will have similar effects on the water's boiling point.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which question can be answered through scientific investigation?

• What are your opinions on the cause of climate change?

• Should the United States invest in cleaner energy resources?

• Why should you do math in pencil instead of pen?

• How does water quality impact the ecosystem?

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

The data table below shows the data collected during an experiment to determine the amount of a substance, Ammonium Chloride, that can be dissolved in 100 g of water at various temperatures. What is the independent variable in this experiment?

• water temperature

• amount of substance dissolved

• amount of water used

• heating method of the water

Tags

NGSS.MS-PS1-4

The information below shows what happens to incoming solar radiation.

30% reflected by the atmosphere

20% absorbed by the atmosphere

50% reflected by Earth's surface

What type of graph would be best to show this information?

• A bar graph

• A line graph

• A scatterplot

• A pie chart

Planets in the solar system are in constant motion. What factor has the greatest effect on the orbits of the planets?

• the size of the planets

• gravitational pull of the sun

• the composition of the planets

• electromagnetic radiation from the sun

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Andrea is preparing a demonstration to model the water cycle for her class. She fills a watering can with water from a faucet. She pours water onto a board propped up on some books. The board is slanted and the water drains into a pan. Andrea says that the water from the can represents precipitation, the board represents runoff, and the pan represents collection. How could this model be improved?

• Add a heat lamp pointed at the setup to model evaporation.

• Remove the books from holding the board.

• Remove the board and have her pour the water directly into the collection tank.

• Increase the temperature of the water in the watering can.

Tags

NGSS.MS-ESS2-4

On February 21, a student observes that the Moon cannot be seen in the clear night sky during a New Moon phase. On what date will the student not be able to see the Moon again in the clear night sky?

• February 28

• March 7

• March 14

• March 21

Tags

NGSS.MS-ESS1-1

It takes 24 hours for Earth to make on full rotation. This 24-hour rotation is directly responsible for causing

• seasons

• earthquakes

• day and night

• rain and hail

Which location can you expect the warmest temperatures to occur.

• A

• B

• C

• D

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

The graph shows the density of air at different altitudes. Which statement correctly defines the relationship between the density of air and the altitude?

• The density of air remains constant at all altitudes

• The density of air increases with an increase in altitude

• The density of air decreases with an increase in altitude

• The density of air initially decreases, and then increases, with an increase in altitude