Earth and Space Cast

Based on the model, ocean acidification occurs because there is:

• less CO2 in the atmosphere than in the ocean

• more CO2 in the atmosphere than in the ocean

• less CO2 leaving the ocean than entering the ocean

• more CO2 leaving the ocean than entering the ocean

Answer explanation

Acids contain Hydrogen atoms and increase the H+ ions in water.

CO₂ + H₂O ---> H⁺ + HCO₂

H+ ion's make the aqueous environment acidic.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Students were asked to use a beaker and water to model how thermal convection cycles material below Earth's crust. Which situation best models thermal convection?

• When water is left in an open beaker for days, it will completely evaporate.

• When water in a beaker is warmed in sunlight on a windowsill, water evaporates slowly on one side and quickly on the other side.

• When water in a beaker is warmed in a microwave oven for too long, it will boil and eventually vaporize completely.

• When water in a beaker is warmed over a small flame, uneven heating causes warmer water near the bottom to rise and replace cooler water near the surface, which then sinks.

Answer explanation

Heat energy moves from areas of higher heat to lower heat. How it moves is dependent on medium, the molecules, and waves.

Watch the video.

Tags

NGSS.MS-PS1-4

The star chart shows the positions of some constellations in summer and winter. Why are some constellations only visible during summer or winter?

• Some constellations have stars that give off less light during different seasons.

• Some constellations are blocked by the location of the Sun during different seasons.

• The stars in some constellations move farther away from the Sun during different seasons.

• The stars in some constellations move together in new patterns during different seasons.

Answer explanation

The tilt of the earth causes us to see different star throughout the year and can be blocked by the sun at other times.

Tags

NGSS.MS-ESS1-1

A student living in the Northern Hemisphere observes the Ursa Major constellation in the northeastern sky with a telescope in February. The student sees the same constellation in the northwestern sky in July.

Which causes the Ursa Major constellation to appear in different locations in the sky in February and July?

• the rotation of Earth on its axis

• the revolution of the stars in the constellation around the Sun

• the revolution of Earth around the Sun

• the distance between the stars in the constellation and Earth

Tags

NGSS.MS-ESS1-1

A student uses a flashlight, globe, golf ball, and tongs in a dark room to model a lunar eclipse. The student tries two different models, as shown. Which statement correctly identifies and explains which model shows a lunar eclipse?

• Model 1; Earth allows half the sunlight to reach the Moon.

• Model 1; Earth allows most of the sunlight to reach the Moon.

• Model 2; Earth blocks all the sunlight from reaching the Moon.

• Model 2; Earth blocks a small amount of sunlight from reaching the Moon.

Tags

NGSS.MS-ESS1-1

The diagram shows that the phase of the Moon on two different days in the same year is the same even though the position of the Moon in its orbit around Earth is different. Why can the same phase of the Moon occur at two different places in its orbit?

• The position of Earth in its orbit around the Sun changes, causing the direction of sunlight

  hitting the Moon’s surface to change.

• The direction that Earth rotates on its axis changes, causing a different side of Earth to face the Moon each month.

• The tilt of the Moon on its axis changes, causing the direction that light travels from the Moon to Earth to change.

• The speed of the Moon orbiting around Earth changes, causing the position of the Moon to be different each month.

Tags

NGSS.MS-ESS1-1

In Which position would the Southern Hemisphere experience winter?

• Position A

• Position B

• Position C

• Position D

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS2-6

In which position would the Northern Hemisphere be experiencing spring?

• Position A

• Position B

• Position C

• Position D

Tags

NGSS.MS-ESS1-1

Which location would a 1st quarter moon be visible?

• 2

• 3

• 5

• 7

Tags

NGSS.MS-ESS1-1

Why is it warmer in the summer?

• Closer to the sun

• More direct light from Earth's tilt

• Stronger light from the sun

• Earth spins slower

Answer explanation

More thunderstorms occur during summer than any other time of year.

Tags

NGSS.MS-ESS1-1