International Science Olympiad

Which substance provides humans with their main source of energy?

• food

• carbon dioxide

• water

• chlorophyll

The wheels and gears of a machine are greased in order to decrease

• potential energy

• efficiency

• output

• friction

Tags

NGSS.MS-PS2-5

Weather forecasts are more accurate today than in the past due to

• (A) global warming

• (B) air-quality control

• (C) plate tectonics

• (D) use of images from space

The endocrine system produces chemicals that affect organ functions. These chemicals are called

• (A) nutrients

• (B) hormones

• (C) microbes

• (D) wastes

The diagram below shows the frequency and wavelength of various types of electromagnetic energy.

Which type of electromagnetic wave has a wavelength of approximately 10^-10 meter and a frequency of 10¹⁸ hertz?

• (A) infrared

• (B) radio

• (C) X ray

• (D) radar

Tags

NGSS.MS-PS4-1

The presence of some similar structures in all vertebrates suggests that these vertebrates

• (A) all develop at the same rate

• (B) evolved from different animals that appeared on Earth at the same time

• (C) all develop internally and rely on nutrients supplied by the mother

• (D) may have an evolutionary relationship

Tags

NGSS.MS-LS4-2

Which part of a cell allows nutrients and other materials to enter or leave the cell?

• (A) cytoplasm

• (B) nucleus

• (C) chloroplast

• (D) cell membrane

Base your answers to questions 8 and 9 on the table below, which compares human population and sulfur dioxide (SO²) levels in the atmosphere over time.

How have the size of the human population and the amount of sulfur dioxide (SO²) in the atmosphere changed from 1960 to 1990?

• (A) The human population has increased while the amount of SO² has decreased.

• (B) The human population has decreased while the amount of SO² has increased.

• (C) Both the human population and the amount of SO² have increased.

• (D) Both the human population and the amount of SO² have decreased.

Tags

NGSS.MS-ESS3-4

Which human activity might explain the change in sulfur dioxide levels shown in the graph?

• (A) storing nuclear waste

• (B) collecting solar energy

• (C) using wind energy

• (D) burning fossil fuels

Tags

NGSS.MS-ESS3-4

The diagram below shows a cell.

This cell would be found in which type of organism?

• (A) animals

• (B) fungi

• (C) viruses

• (D) plants

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2