WCAS Science

Students list ways people at their school can reduce landfill waste.

Ways to Reduce Landfill Waste at Our School

>serve lunches on reusable plates

>turn in some homework using email

>copy worksheets on both sides of paper

>replace paper towels with hand dryers

Which other idea would most likely be included on this list?

• remove trash cans from hallways

• turn off lights when leaving a room

• replace old textbooks with newer ones

• add recycle bins for paper in classrooms

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

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-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A student needs to separate a mixture compsed of iron fillings and sand. How can the student most easily separate all the iron fillings from the mixture?

• Use a magnet to attract the iron filings

• Use filter paper to isolate the iron filings

• Add water to the mixture and pour off the floating iron filings.

• Add water to the mixture and allow it to evaporate and leave behind the iron filings

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

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

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Two words that correctly identify properties of these planets

Uranus -Neptune- Saturn- Jupiter

• rocky

• gaseous

• large

• small

Tags

NGSS.MS-ESS1-3

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 diagram shows what happens when wood is burned

Burning Wood

^{wood + oxygen} = ^{ashes+carbon dioxide gas + water}

^{(starting) ------------------------------ (ending)}

Which statement best explains the change that occurs when wood is burned?

• This is physical change because the products can be changed back into wood

• This is physical change because the products are different from the starting materials

• This is chemical change because the products can be changed back into wood

• This is chemical change because the products are different from the starting materials

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5