C165 Integrated Physical Sciences Practice Questions - Set 1 - Part 1

Correct Answer: b) Amount of sunlight

The independent variable is the one that is manipulated in the experiment, and in this case, it is the amount of sunlight. The other factors (e.g., plant height, soil type) are either dependent variables or constants.

Correct Answer: c) Mathematical model

A mathematical model uses equations and mathematical representations to describe systems or predict outcomes, which is being used in this case.

Correct Answer: b) It allows you to change only one variable at a time

Laboratory experiments give more control over variables, allowing only one variable to be manipulated at a time, which helps determine the cause-and-effect relationship.

Correct Answer: c) Earth Science

Earth Science focuses on studying the Earth’s structure, including tectonic plates, making it the correct choice here.

Correct Answer: c) It traps heat, raising Earth’s temperature

The greenhouse effect involves gases in the atmosphere trapping heat, which warms the planet.

Correct Answer: c) Chemistry

Chemical bonds form through interactions between atoms, which is explained by principles in Chemistry.

Correct Answer: b) Photosynthesis

Photosynthesis is the process by which plants use sunlight to produce food from carbon dioxide and water.

Correct Answer: a) Isaac Newton

Isaac Newton first described the law of gravity, stating that every mass attracts every other mass with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.

Correct Answer: b) The energy of an object in motion

Kinetic energy is the energy an object has due to its motion. It depends on the object's mass and velocity.

Correct Answer: b) Freezing of water

Exothermic reactions release heat. The freezing of water releases heat as water turns into ice, making it an exothermic process.

Correct Answer: b) The mantle

The mantle is the thickest layer of the Earth and makes up the majority of the Earth's mass.

Correct Answer: b) Skin

The skin is the largest organ in the human body, covering and protecting the body from environmental factors.

Correct Answer: a) Evaporation

Evaporation is the process where liquid water changes into water vapor (gas) due to heat.

Correct Answer: b) 6

The atomic number of Carbon is 6, which means it has 6 protons in its nucleus.

Correct Answer: b) Au

The chemical symbol for Gold is Au, derived from the Latin word "aurum."

Correct Answer: b) Mars

Mars is known as the "Red Planet" due to the iron oxide (rust) that gives its surface a reddish appearance.

Correct Answer: b) H2O

The chemical formula for water is H2O, indicating two hydrogen atoms bonded to one oxygen atom.

Correct Answer: c) 7

There are seven continents on Earth: Asia, Africa, North America, South America, Antarctica, Europe, and Australia.

Correct Answer: b) Carbon Dioxide

Plants absorb carbon dioxide (CO2) from the air for photosynthesis, which they convert into oxygen and glucose.

Correct Answer: b) Blue Whale

The Blue Whale is the largest mammal on Earth, reaching lengths up to 100 feet (30 meters) and weighing up to 200 tons.