WCAS

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

Which is the correct order of the food chain of the channel catfish?

• A,B,C,D

• B,C,D,A

• C,D,A,B

• D,B,A,C

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

The model shows a process that occurs in a tomato plant

A process Occurring in a Tomato Plant

Which labels correctly complete the model to help describe this process?

• water sunlight stored energy

• sunlight stored energy water

• sunlight water stored energy

• stored energy water e.sunlight

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The diagram below represents the saltwater solution made by the student. When salt (NaCl) molecules are added to water (H2O), they break into one sodium (Na) particle and one chlorine (Cl) particle.

Chose the name of the solvent and solute

• Solute = H2O Solvent=NaCI

• Solvent = H2O Solute= NaCl

List the steps of the scientific method

d

e

f

c

b

a

Ask a question

Conduct experiment

Draw conclusions

Communicate results

Form a hypothesis

Analyze results

Which letter represents amplitude? (a)  

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS4-1

From November to February, the constellation Orion is clearly visible in the night sky from Mississippi. Orion appears to rise from the east and set in the west. The stars do not actually move through the sky. They appear to change positions due to the Earth's Movement.

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

WCAS: What is the chemical formula for water?

Tags

NGSS.MS-PS1-1