Science Final

During an investigation, a student measures out 15 grams of salt. Then, he measures 15 milliliters of water and adds the salt to it. Next, he measures a 1 centimeter wide by 4 centimeters long section of plant leaf. Which list of tools is arranged in the order that the student used them?

• graduated cylinder, ruler, balance

• balance, ruler, graduated cylinder

• graduated cylinder, balance, ruler

• balance, graduated cylinder, ruler

How much water should be added to the graduated cylinder shown below to increase the volume to 15 milliliters?

• 11 mL

• 10 mL

• 3 mL

• 4 mL

The basic unit of length in the metric system is the

• kilogram

• gallon

• liter

• meter

The basic unit of mass in the metric system is the

• kilogram

• gallon

• liter

• meter

The basic unit of volume in the metric system is the

• kilogram

• gallon

• liter

• mass

Diagrams, tables, and graphs are used by scientists mainly to

• design a research plan for an experiment

• test a hypothesis

• organize data

• predict the independent variable

Which relationship can correctly be inferred from the data presented in the graphs?

• As sewage waste increases, oxygen content decreases.

• As sewage waste increases, oxygen content increases.

• As oxygen content decreases, carp population decreases.

• As oxygen content decreases, trout population increases.

Heat flows from an object at a temperature of 20°C to an object at a temperature of

• 15°C

• 25°C

• 35°C

• 45°C

Pots and pans are usually made of metal because metals are good _______ of heat.

• convectors

• forces

• conductors

• insulators

Which of the following always happens when heat is added to a substance?

• Its molecules speed up.

• Its molecules slow down.

• Its temperature increases.

• Its temperature decreases.