Science fifth review

A student is designing a boat to carry ten marbles across water. The student designs a boat, and it sinks when five marbles are added. Which question will help the student improve the boat?

• Are marbles more dense than water?

• What can decrease the density of the boat?

• How deep is the water in the container?

• Do ten marbles weigh more than five marbles?

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Which statement best describes Earth’s gravity?

• Gravity is a force that pulls all objects down to Earth’s surface.

• Gravity is the result of an object pushing on Earth’s surface.

• Gravity is the motion of Earth that causes objects to fall to Earth’s surface.

• Gravity is a force that pushes objects down to Earth’s surface.

Tags

NGSS.5-PS2-1

A student creates a saltwater solution by mixing salt and water. Which statement best describes how to find the mass of the saltwater solution?

• Divide the mass of the water by the mass of the salt.

• Multiply the mass of the water by the mass of the salt.

• Subtract the mass of the salt from the mass of the water.

• Add the mass of the salt to the mass of the water.

What is true about molecules and atoms?

• Molecules capture atoms for energy.

• Molecules create atoms from nothing.

• Molecules can be broken down into atoms.

• Molecules attach to form atoms.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

A student has a mixture of sand and gravel that needs separating. The student pours the mixture through a filter. The sand and gravel both get stuck in the filter and do not separate. Which action should the student take to separate the mixture successfully?

• Sifting; the smaller sand will fall through the sifter, and the larger gravel will stay in the sifter.

• Evaporation; the sand will evaporate, and the gravel will stay in the container.

• Flotation; the gravel will float on the top of the water, and the sand will sink to the bottom.

• Magnetic attraction; the gravel will stick to a magnet, and the sand will stay in the container.

Humans use plastic products and produce large quantities of plastic waste. This waste ends up in landfills and oceans, causing further harm to the environment. Which would be the best for the environment and a long-term solution to reduce the amount of plastic waste that ends up in landfills and oceans?

• gathering and burning the plastic waste twice a year

• replacing plastic with materials that naturally break down to form soil

• making new plastic products from stronger plastic

• storing plastic waste in large containers above ground

Tags

NGSS.MS-ESS3-3

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

A student classifies the decay of a plant over time as a chemical change. Is the student correct, and why?

• No. The decay of a plant is reversible.

• No. The decay of a plant creates a new material.

• Yes. The decay of a plant is reversible.

• Yes. The decay of a plant creates a new material.

Tags

NGSS.MS-PS1-2

Which force causes the parachuters to move toward the surface of Earth?

• electrical

• friction

• gravity

• magnetism

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Which is a physical change that happens when a candle burns?

• burning of the wick to give off heat and light

• glowing red and orange colors of the candle’s flame

• melting of candle wax that drips down to the bottom

• releasing of black smoke when flame is blown out

A student claims that telescopes play an important role in exploring. Which use of telescopes supports the student’s claim?

• Telescopes help predict weather conditions on Earth.

• Telescopes help find new planets, stars, and galaxies.

• Telescopes help collect gases from the Sun.

• Telescopes help move asteroids away from Earth.