Grade 1 Science: 10 Free Practice Questions

Answer: Blow a loud horn
A loud horn uses sound to warn other ships through the fog. In thick fog, light and flags are hard to see. Sound can travel through fog, so a loud horn is the best way for the ship to warn others that it is nearby. Students may pick a light or flag, but in fog these are hard to see; sound travels better in fog than sight.

Answer: A plastic sheet
A plastic sheet is the best material because water cannot soak through it. A good roof must keep water out. Plastic does not soak up water, so the toys stay dry. Paper, sponge, and cotton all soak up water and would leak. Students may pick a paper towel because it is flat, but paper soaks up water and lets it through.

Answer: Sunlight
A green plant needs sunlight to make its own food. Green leaves use sunlight to make food for the plant. Without light, the plant cannot grow strong. So sunlight is the correct need. Students may pick something they enjoy, like music, but plants use sunlight, not sound, to make food.

Answer: rabbit
A rabbit eats plants.

Answer: Tapping a table gently with one finger
Tapping gently with one finger makes a soft, quiet sound. A big, strong movement makes a loud sound. A small, gentle movement makes a soft sound. Tapping the table lightly with one finger is a small movement, so it makes a quiet sound. Students may confuse loud actions like clapping hard or shouting with quiet ones; loud actions create louder sounds.

Answer: Sunlight and water
Plants need sunlight and water to grow. Plants use sunlight and water to stay healthy and grow. Without light or water, a plant will wilt. Toys and music do not help a plant grow. Students may think a plant grows best in darkness, but most plants need light to make their food and grow strong.

Answer: a puppy
A baby dog is a puppy.

Answer: Different objects can make different sounds
The example shows that different objects can make different sounds. The drum makes a deep, low sound, and the bell makes a bright, high sound. Because the two objects make different sounds, we learn that different objects can make different kinds of sound. Students may pick that only big objects make sound, but the small bell also makes a sound, so size does not decide whether something makes sound.

Answer: A thick winter coat
A thick winter coat keeps the body warm on a cold, snowy day. Cold weather makes people lose heat, so they need warm clothes. A thick coat traps body heat and blocks cold air. Swimsuits, sandals, and sun hats are for hot, sunny weather. Students may pick a sun hat because a hat covers the head, but a sun hat is thin and made for hot days, not warmth.

Answer: Light from the Sun bounces off the Moon
The Moon shines because sunlight bounces off it. The Moon does not make its own light. The Sun's light travels to the Moon and bounces off its surface toward Earth. That reflected sunlight is what makes the Moon look bright to us. Students commonly believe the Moon makes its own light, but it only reflects light from the Sun.