Physical Science Final Exam 2025

Which piece of lab equipment would be best to use if you wanted to stir the contents of a test tube while over the flame of a Bunsen burner?

• tongs

• graduated cylinder

• glass stirring rod

• test tube clamp

Which of the following represents a constant in this experiment?

• throwing some objects and dropping others

• the height at which the object is dropped

• the object dropped

• the falling time

An experiment was designed to investigate the effect of caffeine on the heartbeat of water fleas. Two groups of water fleas were cultured. Both groups had water with the same mineral content, were supplied with identical amounts of bacteria as food, received the same amount of light, and had their temperature maintained at 20° C. Every two hours, water fleas from both groups were selected and their heartbeat was checked. The fleas of group A had caffeine administered five minutes before their heartbeat was checked. The fleas of group B were given nothing. 12. What part of the experiment was group B?

• variable

• experimental group

• constant

• control group

Which of the following is not one of the main base units used in the metric system?

• gram

• yard

• meter

• liter

Which of the following tools would be best suited to measure the volume of an irregular object?

• beaker

• meter stick

• graduated cylinder

• thermometer

15. Beaker A has a mass of 34 g. A concentrated solution is added to the beaker and the mass of the beaker and the substance together have a mass of 64 g. What is the mass of the substance in grams?

Rashad and Carlos measure the length, width, and height of a textbook at 6 cm, 4 cm, and 3 cm respectively. What is the volume of the textbook?

• 13 cm³

• 20 cm³

• 72 cm³

• 96 cm³

What is the measurement shown in the graduated cylinder?

• 10 mL

• 11 mL

• 12 mL

• 13 mL

A scandium, Sc, atom contains 45 electrons outside the nucleus and 21 neutrons inside the nucleus. The atoms of a certain element each contain 11 protons and 1 valence electron. Which statement correctly identifies this element and describes its chemical reactivity?

• The element is fluorine, and it is highly reactive.

• The element is fluorine, and it is not very reactive.

• The element is sodium, and it is not very reactive.

• The element is sodium, and it is highly reactive.

A scientist performs tests on a sample of an element. The element is a shiny solid that conducts electricity and heat. The scientist is able to bend and flatten the sample when pressure is applied to it. Based on this information, the element could NOT be a member of which group on the periodic table?

• Group 18

• Group 8