Opening Assignment Answer this open response question The diagram below shows a cube being studied by a science class.   The density of water is 1.0 g/cm³. Although the class has no water, the students want to know if the cube will float or sink in water. a) List the instruments needed to conduct this investigation. b) Explain, in detail, the steps that must be taken to determine if the cube will float or sink.

MCAS Physical Science Questions

Differentiate between weigh and mass

The table below shows the mass and the weight of a certain object on Earth. The force of gravity on the Moon is about one-sixth the force of gravity on Earth. What are the approximate mass and approximate weight of the same object on the Moon? A B C D

Mass and weight are not different! Your weight on the moon!

Lab equipment What piece of equipment do you measure mass with? Volume? Length? Temperature?

Units What do I measure? Properties of matter 1. cm 2. cm3 3. oC 4. mL 5. g 6. g/cm3 7. m 8. g/mL A. mass B. volume C. Length D. Density E. Temperature

Explain and give examples how mass is conserved in a closed system

In the chemical reaction shown below, all of the HCl and Zn will react to form H2 and ZnCl2. Which of the following statements describes the result of this reaction?   A. The hydrogen gas will have a mass of zero. B. The zinc chloride will have less mass than the zinc. C. The mass of the products will equal the mass of the reactants. D. The mass of the hydrogen atoms will decrease in the products.

Measurements using Significant digits 1. when measuring, estimate the last digit

Score of 4

Recognize that a substance has a melting point, boiling point… independent of sample size

Question 8 If 1 kg of the compound toluene melts at −95°C, then 500 g of toluene will   A. melt at −47.5°C. B. melt at −95°C. C. boil at 95°C. D. boil at 47.5°C.

The diagram below shows some positions in the path of a pendulum swinging from a fixed point called a fulcrum. The pendulum is raised to the start position and released. At which two numbered positions is the potential energy of the pendulum most likely the same?

Differentiate between potential and kinetic energy At which time is potential energy converted into kinetic?

Which of the following could occur as a result of decreasing the heat energy of a gas? A. condensation B. evaporation C. radiation D. vaporization

When a person’s sweat evaporates, the person feels cooler When a person’s sweat evaporates, the person feels cooler. Which of the following statements best describes why sweating helps the person feel cool?