Exploring Lab Safety and the Scientific Method in Physical Science

The video tutorial covers various science topics, including lab safety, the scientific method, properties of matter, electricity, magnetism, motion, gravity, and energy. It also provides test preparation tips and reviews sample test questions to help students prepare for their science exams.

What should you do if you have an accident in the lab?

• Ignore it and continue working

• Report it to the person in charge immediately

• Try to fix it yourself

• Leave the lab

Which of the following is NOT a step in the scientific method?

• Ask a question

• Form a hypothesis

• Guess the results

• Conduct an experiment

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What is the smallest unit of an element that retains the properties of that element?

• Grain of sand

• Cell

• Atom

• Molecule

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Which of the following is a chemical change?

• Boiling water

• Burning paper

• Melting ice

• Breaking a pencil

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What happens to the salt when salt water is boiled?

• It changes into a different substance

• It evaporates with the water

• It remains in the beaker

• It turns into a gas

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What is the role of a switch in an electric circuit?

• To store electrical energy

• To increase the voltage

• To break or complete the circuit

• To convert electricity to light

What is the main difference between permanent and temporary magnets?

• Temporary magnets are made of plastic

• Temporary magnets lose their magnetism quickly

• Permanent magnets can be turned on and off

• Permanent magnets are always stronger

What force causes objects to fall to the ground?

• Magnetism

• Friction

• Gravity

• Inertia

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What is inertia?

• The force that opposes motion

• The rate of change of velocity

• The tendency of an object to resist changes in its motion

• The force that pulls objects together

Which form of energy is released by a light bulb?

• Electrical and mechanical energy

• Mechanical and heat energy

• Light and heat energy

• Chemical and sound energy

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