Q3 Ultimate 8th Grade Review Part 2_2025

Which configuration will result in the greatest gravitational force?

• Objects with low masses, far apart

• Objects with large masses, far apart

• Objects with low masses, close together

• Objects with large masses, close together

Which of the following best describes the geocentric model of the Sun and planets?

• the belief that Sun and planets revolve around Earth

• the belief that planets revolve around the Sun

• the belief that planets and the moon revolve around Earth

• the belief that Moon and planets revolve around the Sun

Which of the models of the solar system (Geocentric or Heliocentric) is most similar to what we know today and why?

• Geocentric, because only the Moon is shown orbiting the Earth

• Heliocentric, because it includes all nine planets and 2 stars

• Geocentric, because it includes all eight planets orbiting the Earth

• Heliocentric, because the planets are orbiting the Sun

What is the biggest difference between the geocentric and heliocentric models of the solar system?

• The shape of the planets’ orbits

• The center of the solar system

• The movement of the Moon

If you created a venn diagram comparing the geocentric and heliocentric models of the solar system, which of the following statements would go in the center section?

• Both show the planets orbiting the Sun

• Both show the Sun and planets orbiting the Earth

• Both are models of the solar system

• Both are well-received ideas in ancient times

Which approach is primarily used by geologists to explain the formation of Earth’s layers?

• Observing the stars

• Performing chemical reactions

• Studying rock samples

• Conducting animal behavior studies

In biology, what method is typically used to understand the relationship between two species in an ecosystem?

• Conducting field observations

• Calculating chemical equations

• Studying distant galaxies

• Testing physical properties of minerals

In the field of chemistry, how do scientists generally develop explanations for chemical reactions?

• By conducting controlled experiments

• By analyzing literature

• By collecting historical data

• By observing wildlife

Scientists use different types of investigations to develop scientific explanations. In which scenario did a scientist conduct an experiment with a control?

• A scientist determined the relative age of a fossil based on its position in a rock layer.

• A scientist concluded that a new fertilizer doubled the growth of corn plants in a study.

• A scientist identified and classified a new species of fish in the Amazon River in South America.

• A scientist discovered a new galaxy in space after analyzing images from the Hubble Space telescope.

There are many different types of scientific investigations. In one type of investigation, all variables are kept the same except for one. What is this type of scientific investigation called?

• model

• field study

• controlled experiment

• systematic observation