WCAS

A student is identifying properties of chemical particles by using the chart below. Complete the chart by selecting boxes to identify each property as a description of an atom, a molecule, or both

Properties of Particles

Which are composed of more than one particle?

• atom

• molecule

• Hydrogen

Tags

NGSS.MS-PS1-1

Which statement identifies the most likely outcome if the rabbit population suddenly reduced?

• Owls would become extinct because they have no food

• Hawks would have less food available so their population would decrease

• Grasshoppers would have less food available so their population would decrease

• Grasses in the area would die and all of the animals would have to move to another area to survive

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

the chart below shows environmental characteristics of four ecosystems Which statement accurately describes the vegetation or animals that would be best supported by the ecosystem?

• the desert would support animals that need to remain cool

• the pond would support animals that can survive in saltwater environment

• the tropical rainforest would support plants that are tall and have then needles

• the polar tundra would support plants that are small and grow close to the ground

Tags

NGSS.MS-LS2-1

Which statement best describes an effect of humans on this food web?

• the population of bald eagles may be reduced by humans consuming too many smelt.

• Competition among humans, alewife, and smelt decreases food availability for bald eagles

• Humans decrease the populations of phytoplankton and zooplankton by consuming chinook salmon

• Human consumption of coho salmon and chinook salmon may reduce food sources for herring gulls

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The diagram shows four blocks of the same size in a water tank. Block Y has the same density as the water.

Four additional block are being added to the water as detailed (Block J= 1kg) - (Block K =3 kg)- (Block L=5 kg)-(Block M=7kg)

Pick two answers choices - the two blocks that will float and two blocks that will sink.

• BLOCK J & K WILL FLOAT

• BLOCK J & K WILL SINK

• BLOCK L & M WILL SINK

• BLOCK L & M WILL FLOAT

What is the chemical formula for water?

Tags

NGSS.MS-PS1-1

Which of the following is a noble gas?

• Oxygen

• Nitrogen

• Helium

• Hydrogen

What is the acceleration due to gravity on Earth?

• 9.8 m/s^2

• 10 m/s^2

• 8.9 m/s^2

• 9.1 m/s^2

Which planet is known as the Red Planet?

• Earth

• Mars

• Jupiter

• Venus

What is the process by which plants make their food using sunlight?

• Respiration

• Photosynthesis

• Transpiration

• Digestion

Tags

NGSS.MS-LS1-6