WCAS Practice

Use the scenario to answer the next two questions Making solutions Solutions are mixtures that are very common in our daily lives. A solution is composed of a solute and a solvent. A student conducted an investigation using 50 milliliter of distilled water and 5 grams of table salt. The water for each test was brought to a certain temperature before the salt was added. The data from the investigation are shown in the graph. Which conclusion best describes the data in the graph?

• Increasing the amount of solvent increases the temperature of a solution

• Increasing the temperature of the solute increases the amount of the solution

• the amount of solute in a solution determines the time needed for the solute to dissolve in the solvent

• A decrease in the temperature of a solvent increases the time needed for a solute to dissolve in a solvent

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What factor is responsible for the changes in Orion's position when viewed during the winter month?

• the rotation of the Sun

• the rotation of Earth on its axis

• the revolution of the Sun around the Earth

• the revolution of the moon around the Sun

Tags

NGSS.MS-ESS1-1

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 particles held together by bonding?

• atom

• molecule

Tags

NGSS.MS-PS1-1

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 is the smallest particle of an element with properties of that element?

• atom

• molecule

Tags

NGSS.MS-PS1-1

Which letter represents amplitude? (a)  

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS4-1

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

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

What is the chemical formula for water?

Tags

NGSS.MS-PS1-1

Which planet is known as the Red Planet?

• Earth

• Mars

• Jupiter

• Venus