Cluster 3 Matter Middle School 2019

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

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.

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.

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.

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.

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.

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

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.