2019 Post-test Review

What is the difference between the substances represented by the symbols Co and CO?

• They are two different ways to represent the element cobalt.

• One is the symbol for an element, and one is a formula for a compound.

• Co represents the element cobalt, and CO represents the element copper.

• They represent two substances, each made up of two elements.

Tags

NGSS.MS-PS1-1

Which process best explains how antibiotic resistance in bacteria can occur?

• Bacteria gradually become more resistant to an antibiotic and pass on their resistance to their offspring.

• Bacteria that already have a genetic resistance to an antibiotic will survive and pass on the resistance to their offspring.

• A patient becomes resistant to antibiotics, depending upon the conditions of the hospital.

• While being treated with an antibiotic, some bacteria will become stronger and survive to pass on the resistance to their offspring.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS4-4

A chemist combined methane gas (CH₄) and oxygen gas (O₂) in a closed container and heated the container. A chemical reaction occurred, creating carbon dioxide (CO₂) and water (H₂O). Which of the following is evidence that a chemical reaction occurred?

• The products have the same number of elements as the reactants.

• The products include different substances than the reactants.

• The products have the same atoms as the reactants.

• The reactants and products have the same number of molecules.

Tags

NGSS.MS-PS1-2

A baker has two identical cakes except that one cake is hot (40ºC), and the other cake is at room temperature (20ºC). He places both cakes next to each other on the same cold plate (10ºC). Choose the claim that best explains what happens to the energy in the cakes.

• Only the hot cake transfers energy to the plate.

• The plate transfers energy to the room-temperature cake.

• Both cakes transfer energy to the plate.

• Neither cake transfers energy to the plate.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Where are you most likely to experience an earthquake?

• Along the boundary of a crustal plate

• Along a volcanic island chain

• In a subduction zone

• Randomly anywhere on Earth

Tags

NGSS.MS-ESS3-2

Some students are testing rock samples they collected. If you wanted to test these rocks for calcite, what would you put in the bottle and what would you expect to happen if calcite is there?

• Put water in the bottle; if there is calcite, the rock will dissolve.

• Put salt water in the bottle; if there is calcite, the rock will turn a darker color.

• Put acid in the bottle; if there is calcite, the rock will fizz.

• Put liquid soap in the bottle; if there is calcite, the liquid will form a dome on the rock.

Tags

NGSS.MS-PS1-2

Scientists recently discovered a patch of oceanic crust deep beneath the Mediterranean Sea that is estimated to be 340 million years old. It is the oldest oceanic crust ever found. If scientists believe Earth is actually 4.6 billion years old, why haven’t scientists found older oceanic crust?

• Rocks did not cool on Earth until about 340 million years ago.

• It is too hard to collect samples of oceanic crust.

• Oceanic crust subducts under continental crust as new oceanic crust forms.

• Oceanic crust is younger than continental crust.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-1

Examine the figure of the syringe. What would happen to the particles in the syringe if you push the plunger down?

• There are fewer air particles in the syringe.

• The air particles move farther apart.

• There are more air particles in the syringe.

• The air particles move closer together.

Tags

NGSS.MS-PS3-4

A student dissolved 20 g of salt in a cup of water. She left the cup uncovered in an area where nobody could touch it. When she returned to the cup 10 days later, she found that all the water was gone, and there were crystals in the bottom of the cup. What is the best conclusion, based on her observations?

• The water evaporated, and there is 20 g of salt in the cup.

• The water and some salt evaporated, but some salt is left in the cup.

• There was a chemical reaction, and a new solid was left behind.

• The water and salt separated and then the water evaporated, but there is no way to know what is left in the cup.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A snapdragon produces either yellow or white flowers. The dominant allele (Y) produces yellow flower color and the recessive allele (y) produces white color. What combination or combinations of alleles could produce white flowers?

• YY

• Yy or yy

• Yy or YY

• yy