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IMSO 2005 Taiwan Selection — Science First Round

Question 1

Source instructions (questions 1–30): Each question has four choices. Select the best answer and write its letter on the separate answer sheet. Each correct answer is worth 4 points. Time limit: 90 minutes.

Which statement explains why the Sun appears to rise and set each day?
  1. Earth rotates.
  2. The Sun rotates.
  3. The Sun revolves around Earth.
  4. Earth revolves around the Sun.

Question 2

Which cycle is correct?
  1. morning → sunrise → afternoon → sunset
  2. summer → fall → winter → spring
  3. seed → mature plant → fruit → seedling
  4. baby → teenager → child → adult

Question 3

Which statement describes the general path the Sun takes as it appears to move across the sky for an observer in Taiwan?
  1. The Sun rises in the west and sets in the east.
  2. The Sun rises in the east and sets in the west.
  3. The Sun rises in the north and sets in the south.
  4. The Sun rises in the south and sets in the north.

Question 4

Which unit is used to measure how warm or cool the air is?
  1. grams
  2. kilometers
  3. degrees Celsius
  4. cubic centimeters

Question 5

A soil sample contains living and nonliving materials. Which material was once living?
  1. sand particles
  2. decomposing leaves
  3. small pebbles
  4. water droplets

Question 6

Water is boiled in a pan on a stove. The state of matter of the water changes from
  1. liquid to solid
  2. solid to liquid
  3. gas to liquid
  4. liquid to gas

Question 7

Which kind of energy is produced when a student beats a drum?
  1. electrical
  2. sound
  3. light
  4. chemical

Question 8

Electricity traveling through a wire is an example of
  1. a force applied by a simple machine
  2. energy flowing through the water cycle
  3. Earth’s gravitational pull on an object
  4. energy being transferred from place to place

Question 9

Which forms of energy are produced by a burning candle?
  1. heat and mechanical
  2. electrical and sound
  3. light and electrical
  4. heat and light

Question 10

A toaster changes electrical energy to
  1. heat energy
  2. solar energy
  3. sound energy
  4. magnetic energy

Question 11

In order to survive, all animals need
  1. roots, leaves, and stems
  2. eyes, nose, and ears
  3. light, soil, and nutrients
  4. food, water, and air

Question 12

What does a seed contain that provides energy for germination?
  1. water
  2. stored food
  3. soil
  4. sunlight

Question 13

The main purpose of a plant’s flowers is to
  1. provide support
  2. provide water
  3. produce seeds
  4. produce food

Question 14

Which color fur will best protect a rabbit from a hawk in a snowy field?
  1. brown
  2. gray
  3. white
  4. black

Question 15

Which food is an example of a healthy snack?
  1. an apple
  2. a candy bar
  3. cookies
  4. potato chips

Question 16

What is one healthy way that people can help to maintain their weight?
  1. washing their hands regularly
  2. brushing their teeth twice daily
  3. sleeping 8 hours daily
  4. exercising regularly

Question 17

What is the role of a producer in a food chain?
  1. preys on animals
  2. eats decayed animals
  3. makes food
  4. eats plants

Question 18

The diagram below shows a potato plant in a cup. The cup was originally filled to the top with water. Which statement best explains why the cup no longer contains water?

Question illustration
  1. The water froze.
  2. The water condensed.
  3. The water was taken in by the roots.
  4. The water was moved by gravity.

Question 19

Which list below best shows how energy moves in a food chain?
  1. grass → cows → humans → Sun
  2. Sun → grass → cows → humans
  3. humans → cows → grass → Sun
  4. cows → grass → Sun → humans

Question 20

Base your answer on this food chain: Green plants → Insects → Frogs → Snakes.

In this food chain, the green plants are

Question illustration
  1. producers
  2. predators
  3. decomposers
  4. prey