Challenge your understanding of basic science facts from biology, chemistry, and astronomy with these easy multiple-choice questions. Perfect for all ages and a fun way to refresh your science memory.
Which planet is known as the Red Planet in our solar system?
Explanation: Mars is called the Red Planet because of its reddish appearance caused by iron oxide on its surface. Venus and Jupiter do not have this distinctive color, and Saturn is known for its rings, not its color.
What organ in the human body pumps blood throughout the body?
Explanation: The heart is responsible for pumping blood through the circulatory system. The lungs handle gas exchange, the liver detoxifies chemicals, and the brain controls body functions but does not pump blood.
What is the chemical symbol for water?
Explanation: Water is represented by H2O, meaning two hydrogen atoms and one oxygen atom. O2 is molecular oxygen, CO2 is carbon dioxide, and HO2 is not the correct formula for water.
What force keeps us on the ground and prevents us from floating into space?
Explanation: Gravity is the force that pulls objects toward the Earth's center, keeping us grounded. Magnetism involves magnetic fields, friction resists motion, and inertia is an object's resistance to changes in motion.
What is the process called by which green plants make their own food using sunlight?
Explanation: Photosynthesis allows plants to convert sunlight into chemical energy, creating food. Respiration is how organisms obtain energy, fermentation is an anaerobic process, and digestion breaks down food but does not create it.
Which organ helps detoxify the human body by filtering blood?
Explanation: The liver filters toxins from the blood and aids in detoxification. Kidneys remove waste but focus on water and salt balance, the heart pumps blood, and the stomach digests food.
What is the basic building block of all matter?
Explanation: Atoms are the smallest unit of matter that retain chemical properties. Cells are basic units of life, molecules are groups of atoms bonded together, and crystals are structures made of repeated units.
What form of energy do solar panels convert into electricity?
Explanation: Solar panels convert sunlight (solar energy) directly into electricity. Chemical energy is found in batteries, kinetic energy is motion, and thermal energy refers to heat.
Which blood cells are primarily responsible for fighting infections?
Explanation: White blood cells are part of the immune system and defend against pathogens. Red blood cells carry oxygen, platelets aid clotting, and plasma is the liquid part of blood.
What is the name of our galaxy that contains the solar system?
Explanation: The Milky Way is the galaxy that contains our solar system. Andromeda is a nearby galaxy, Orion is a constellation, and Black Eye is another galaxy but not ours.