About today's quiz
Physics — Beginner
A new quiz is published every day for this topic and level. Answer the questions, read the explanations, and complete the quiz to keep your streak alive.
Tips before you start
- •Read every question carefully before answering. Some questions include subtle wording that changes the correct answer.
- •Take your time on the first question. There is no time limit, but your total time is tracked for your statistics.
- •After each answer, read the explanation. Even correct answers often include useful context you might not know.
- •Come back tomorrow for a brand new quiz on the same topic. Daily practice is the most effective way to retain what you learn.
BeginnerScience
Today's questions
Today's quiz questions
These are the questions that make up today's quiz. Test your knowledge, see how much you know, and learn from the explanation behind every answer.
1.Why do objects float in water?
- •They float because of their smooth surface
- •They float when they are less dense than water (buoyancy)
- •Floating depends only on the object's weight
- •Water pushes all objects upward equally
2.What happens when you rub a balloon on your hair?
- •The balloon becomes heavier
- •Chemical reactions occur
- •Magnetic fields are generated
- •Static electricity is created through charge transfer
3.What are conductors?
- •Materials that generate their own electricity
- •Materials that absorb all light
- •Materials that allow electricity to flow through them easily
- •Materials that block the flow of electricity
4.What is the unit of energy?
- •Watt
- •Ohm
- •Newton
- •Joule
5.What is a simple machine?
- •Any machine that runs on electricity
- •A machine with fewer than 10 parts
- •A hand-powered device that doesn't use fuel
- •A basic device that changes the size or direction of a force
6.What happens when you rub a balloon on your hair?
- •Static electricity is created
- •The balloon gets heavier
- •Nothing happens
- •The balloon becomes magnetic
7.What happens to a metal rod when heated?
- •It becomes magnetic
- •It contracts (gets shorter)
- •It expands (gets longer)
- •It stays the same length
8.What is the boiling point of water at sea level?
- •90°C (194°F)
- •80°C (176°F)
- •110°C (230°F)
- •100°C (212°F)
9.What is the freezing point of water at standard pressure?
- •0°C (32°F)
- •−10°C (14°F)
- •−5°C (23°F)
- •10°C (50°F)
10.What produces a rainbow?
- •Mixing of different gases
- •Heat from the sun
- •Light passing through water droplets
- •Reflection from clouds