The human body, chemistry, physics and Earth science, explained through questions you can actually answer: from what the lungs do to inertia and homeostasis.
9 questions with answers
Try to answer before you open the answer.
Easy
1. Which organ takes oxygen from the air we breathe into the blood?
Lungs
Kidneys
Liver
Stomach
Show answer
A. Lungs
Easy
2. Which human organ do we use to listen to sounds?
Ear
Eye
Nose
Tongue
Show answer
A. Ear
Easy
3. The stomach and the intestines are parts of which body system?
Nervous system
Respiratory system
Digestive system
Circulatory system
Show answer
C. Digestive system
Medium
4. What is the chemical reaction called in which a substance reacts rapidly with oxygen, releasing heat and light?
Oxidation
Corrosion
Fermentation
Combustion
Show answer
D. Combustion
Medium
5. What is the tendency of an object to resist changes in its state of motion?
Gravity
Friction
Inertia
Momentum
Show answer
C. Inertia
Medium
6. What primary type of energy is stored inside a standard household battery before use?
Chemical
Kinetic
Nuclear
Thermal
Show answer
A. Chemical
Harder
7. What biological tendency helps an organism keep internal conditions stable despite changes in the outside environment?
Homeostasis
Mutation
Speciation
Fermentation
Show answer
A. Homeostasis
Harder
8. Which type of blood cell contains haemoglobin and carries oxygen through the body?
Red blood cells
White blood cells
Platelets
Plasma
Show answer
A. Red blood cells
Harder
9. What type of rock is formed by the slow cooling of magma beneath the Earth's surface?
Intrusive igneous rock
Extrusive igneous rock
Sedimentary rock
Metamorphic rock
Show answer
A. Intrusive igneous rock
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