CATEGORY 1: NERVOUS SYSTEM
Which organ controls and coordinates the body?
A. The stomach.
B. The brain.
C. The heart.
✅ Correct answer: B. The brain.
Which organ and sense help you see colors and shapes?
A. Ears — hearing.
B. Nose — smell.
C. Eyes — sight.
✅ Correct answer: C. Eyes — sight.
Which gland helps control growth?
A. The pineal gland.
B. The pituitary gland.
C. The pancreas.
✅ B. The pituitary gland.
What does energy allow things to do?
A. Move, work, or change.
B. Disappear completely.
C. Always become colder.
✅ Correct answer: A. Move, work, or change.
In which direction does heat naturally move between objects at different temperatures?
A. From the colder object to the hotter object.
B. From the smaller object to the larger object.
C. From the hotter object to the colder object.
✅ Correct answer: C. From the hotter object to the colder object.
What are the two main parts of the central nervous system?
A. The brain and spinal cord.
B. The eyes and ears.
C. The bones and muscles.
✅ Correct answer: A. The brain and spinal cord.
Which organ and sense help you listen to music?
A. Ears — hearing.
B. Eyes — sight.
C. Skin — touch.
✅ Correct answer: A. Ears — hearing.
Which hormone does the pineal gland produce to help control sleep and waking up?
A. Insulin.
B. Adrenaline.
C. Melatonin.
✅ Correct answer: C. Melatonin.
What does a thermometer measure?
A. Mass.
B. Temperature.
C. Volume.
✅ Correct answer: B. Temperature.
A metal spoon becomes hot in hot soup. Which type of heat transfer happens through direct contact?
A. Conduction.
B. Convection.
C. Radiation.
✅ Correct answer: A. Conduction.
What do nerves do?
A. Produce hormones.
B. Support the body.
C. Carry messages between the body and the central nervous system.
✅ Correct answer: C. Carry messages between the body and the central nervous system.
Which organ and sense help you detect the smell of flowers?
A. Tongue — taste.
B. Nose — smell.
C. Skin — touch.
✅ Correct answer: B. Nose — smell.
Which gland helps control how the body uses energy?
A. The thyroid gland.
B. The pineal gland.
C. The pancreas.
✅ Correct answer: A. The thyroid gland.
An ice cube becomes liquid water. Then the water becomes ice again. Which changes happen, in order?
A. Freezing → melting.
B. Evaporation → condensation.
C. Melting → freezing.
✅ Correct answer: C. Melting → freezing.
Hot water rises and colder water sinks in a heated pot. What type of heat transfer is this?
A. Radiation.
B. Convection.
C. Conduction.
✅ Correct answer: B. Convection.
You touch something hot and quickly pull your hand away. What is this response called?
A. A reflex.
B. A hormone.
C. A sense organ.
✅ Correct answer: A. A reflex.
You notice that a piece of candy is sweet. Which organ and sense do you use?
A. Nose — smell.
B. Eyes — sight.
C. Tongue — taste.
✅ Correct answer: C. Tongue — taste.
Which option correctly matches both glands with their functions?
A. Adrenal glands → control sleep; pancreas → control growth.
B. Adrenal glands → respond to danger; pancreas → help control blood sugar.
C. Adrenal glands → control blood sugar; pancreas → respond to danger.
✅ Correct answer: B. Adrenal glands → respond to danger; pancreas → help control blood sugar.
Liquid water becomes water vapor. Later, the vapor becomes liquid water. Which changes happen, in order?
A. Melting → freezing.
B. Evaporation → condensation.
C. Condensation → evaporation.
✅ Correct answer: B. Evaporation → condensation.
How does heat from the Sun reach Earth?
A. By conduction.
B. By convection.
C. By radiation.
✅ Correct answer: C. By radiation.
Which statement about neurons is correct?
A. They are glands that produce hormones.
B. They are cells that send and receive messages.
C. They are bones that protect the brain.
✅ Correct answer: B. They are cells that send and receive messages.
You close your eyes and touch an ice cube. Which organ and sense help you feel its temperature and texture?
A. Skin — touch.
B. Tongue — taste.
C. Ears — hearing.
✅ Correct answer: A. Skin — touch.
Which statement is correct?
A. The pancreas produces melatonin, and the pineal gland produces insulin.
B. The thyroid produces adrenaline, and the adrenal glands produce melatonin.
C. The pancreas produces insulin, and the ovaries and testes produce hormones involved in puberty.
✅ Correct answer: C. The pancreas produces insulin, and the ovaries and testes produce hormones involved in puberty.
Which statement is correct?
A. Temperature tells us how hot or cold something is, and thermal energy is related to particle motion.
B. Temperature tells us how heavy something is, and thermal energy is related to sound.
C. Temperature measures volume, and thermal energy stops all particle motion.
✅ Correct answer: A. Temperature tells us how hot or cold something is, and thermal energy is related to particle motion.
Which option correctly classifies all the sources of thermal energy?
A. Natural: Sun, volcano, hot spring. Artificial: oven, heater, iron, stove.
B. Natural: oven, heater, iron. Artificial: Sun, volcano, hot spring, stove.
C. Natural: Sun, oven, stove. Artificial: volcano, hot spring, heater, iron.
✅ Correct answer: A. Natural: Sun, volcano, hot spring. Artificial: oven, heater, iron, stove.