CTBA Retest

Which terms correctly describe a car's motion? Enter the terms for motion into the boxes. A car traveling 75 miles per hour is a description of a car's ______, while a car traveling 75 miles per hour north is a description of a car's ______.

• speed, velocity

• velocity, speed

• acceleration, direction

• distance, displacement

Speed, Velocity, and acceleration are all terms used to describe an objects' motion. Which THREE descriptions are paired with the correct term of motion?

• A bird flying off a branch at 3 m/s² is an example of velocity.

• A train picking up speed moving at 50 m/s squared is an example of acceleration.

• A person running at 10 kilometers per hour is an example of acceleration.

• A boat moving north at 10 kilometers per hour is an example of velocity.

• An airplane traveling at 800 kilometers per hour is an example of speed.

Gregory is visiting his grandmother, who lives 200 km from his house. While traveling there, Gregory had an average speed of 100 km/h. Which of the following is true about Gregory's trip?

• Gregory must have maintained a constant velocity of 100 km/h.

• Gregory must have maintained a constant speed of 100 km/h.

• Gregory must have stopped sometime during his trip.

• Gregory must have completed the trip in 2 hours.

A student taking a tour of a company that makes copper pipes was able to observe a large piece of pure copper. After observing the piece of copper, the student could conclude that copper is —

• composed only of copper atoms and can be represented by the symbol Cu.

• composed only of copper atoms and can be represented by the symbol C.

• composed only of copper and carbon atoms and can be represented by the symbols Cu and C.

• composed only of copper and oxygen atoms and can be represented by the symbols C and O.

Hydrochloric acid, HCl, is one of the substances found in gastric acid, which helps break down food in the digestive system. What is hydrochloric acid?

• A mixture of hydrogen and chlorine atoms

• A compound of hydrogen and chlorine atoms

• An element made of hydrogen and chlorine atoms

• A precipitate made of hydrogen and chlorine atoms

The model below shows a molecule of a gas that is present in Earth's atmosphere. The molecule is —

• an atom composed of oxygen and carbon elements

• an element composed of oxygen and carbon atoms

• a compound composed of oxygen and carbon atoms

• a mixture composed of oxygen and carbon compounds

Sodium sulfate is a chemical used in developing photos. The composition of sodium sulfate is shown in the table.

What is the chemical formula for sodium sulfate?

• Na₂SO₄

• Na²SO⁴

• 2(NaSO)₄

• 2(NaSO₂)

Use the chemical formula displayed below to complete the following statements by selecting the correct answers from the drop-down menus. H₃PO₄ In the chemical formula displayed above, there are ___ different elements and ___ total atoms. There are ___ more oxygen (O) atoms than there are phosphorus (P) atoms.

Silver Nitrate, AgNO3, is a chemical compound used in photography. How many different elements make up this chemical compound?

• 2

• 3

• 4

• 5

Which investigation resulted in a chemical change? Select ONE correct answer.