Which of these greenhouse gases in the air
will increase the most if large forests are cut
down to be used for building without
planting new trees?

• ozone
• methane
• water vapor
• carbon dioxide

A student placed a rock in a graduated cylinder
containing water, causing the water level in the
cylinder to increase by 20 mL. This increase
represents the rock’s

• mass
• volume
• solubility
• temperature

People often wear sunglasses in polar regions
because most of the sunlight that hits a
snow-covered surface is

• reflected
• absorbed
• refracted
• transmitted

Tags

NGSS.MS-PS4-2

A battery-powered cart pulls an 800-gram load
across the floor. If the load were reduced to 400
grams, and the force used to move the cart
remained the same, the cart would

• move slower
• move faster
• move at the same speed
• stop moving

Tags

NGSS.MS-PS2-2

What causes the balloon to move along the string?

• Force from string
• friction between straw and string
• Force from escaping air
• weight of balloon containing air

Tags

NGSS.HS-PS2-1

Herbivores obtain most of their energy by

• consuming animals 
• consuming plants 
• producing sugar
• absorbing sunlight

A biological community is made up of all the

• populations living in an area
• natural resources present in an area
• members of a species on Earth
• environments on Earth

If an ecosystem’s balance is disturbed by a volcaniceruption, what will most likely occur?

• The ecosystem will not change from itsoriginal state.
• The ecosystem will eventually becomebalanced again.
• The consumers in the ecosystem will beginto consume carbon dioxide.
• The consumers in the ecosystem will beginto produce more oxygen.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which force is represented by X?

• Gravity
• Friction
• Electricity 
• Magnetism

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Approximately how long does it take for the Moon to complete one orbit around Earth?

• 1 day
• 1 week
• 1 month
• 1 year

Tags

NGSS.MS-ESS1-1