Middle School Chemistry

As Jose mixed two substances in a test tube he notice that the test tube became warm. He also noticed a gas being emitted from the test tube. Based on Jose's observations what was most likely occurring inside the test tube.

• The two substances underwent a physical change

• The two substances melted

• A new substance was forming

• A change in the mass of the two substances

Tags

NGSS.MS-PS1-2

A student is trying to determine the density of a cube using the formula shown.

What is the density of the cube if it has a mass of 2 grams and a volume of 1 cubic centimeter?

• 3.0 grams/cubic centimeter

• 2.0 grams/cubic centimeter

• 1.0 grams/cubic centimeter

• 0.5 grams/cubic centimeter

Jorge conducted an experiment and included the graph shown in his lab report.

Jorge's experiment involved which of the following.

• A chemical change

• The formation of a new sustance

• A change in the chemical properties of a sustance

• A physical change.

Tags

NGSS.MS-PS1-4

Which is the best way to determine if an object is made of pure silver?

• Determine the solubility of the object.

• Test to see if the object is chemically active.

• Determine the density of the object.

• Compare the mass of the object with the mass of a piece of pure silver.

Tags

NGSS.MS-PS1-1

Thomas performed an experiment to measure the temperature of water as he heated it on a hotplate. At the end of his experiment he plotted the results as shown on the graph. Which of the following properties did Thomas measure?

• Solubility and electrical conductivity.

• Densities and physical states of matter.

• Volume and thermal conductivity.

• Melting point and boiling point.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which part of the atom is indicated by the arrow on the diagram?

• It is an electron and it has a negative charge.

• It is an electron an it has a positive charge.

• It is a proton and it has a negative charge.

• It is a proton and it has a positive charge.

Tags

NGSS.MS-PS1-1

The atomic theory has been developed over many years due to the work of many scientists. Each time new evidence was discovered changes had to e made. Which of the following statements is true about how new evidence affect theories?

• As new evidence is found the evidence is changed to make it better fit the existing theory.

• As new evidence is found the theory is revised to make it fit the data better.

• As new evidence is found the theory is discarded completely.

• As new evidence is found a new theory is introduced that also does not fit the data.

Tags

NGSS.HS-LS4-1

NGSS.HS-LS4-2

Elements on the periodic table are arranged into vertical columns called groups. Which of the following is true of elements in a group?

• All the elements in a group have the same atomic mass.

• All the elements in a group have the same number of neutrons.

• Elements in a group have similar properties.

• Elements in a group have the same number of protons.

Plants produce their own food during photosynthesis. Which of these substances is also a product of photosynthesis?

• Carbon dioxide

• Chrolophyll

• Oxygen

• Water

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Plants undergo photosynthesis and cellular respiration. Which statement correctly compares photosynthesis with cellular respiration?

• Both processes require sunlight

• Neither process requires water.

• Photosynthesis releases energy which cellular respiration stores energy.

• Photosynthesis stores energy which cellular respiration releases energy.

Tags

NGSS.MS-LS1-6