Which planet has the most massive atmosphere, composed mostly of hydrogen and helium?

The layer of the Earth responsible for generating the planet’s magnetic field is the:

What type of rock is formed from molten magma that cools and solidifies?

Which of the following conditions is most favorable for the formation of a tropical cyclone?

The presence of marine fossils in sedimentary rock layers most likely indicates that the area was once:

A student observes that the moon appears to change shape throughout the month. What explains this phenomenon?

What causes most earthquakes along tectonic boundaries?

Which community activity best promotes preparedness for volcanic eruptions?

In the scientific method, what comes directly after formulating a hypothesis?

Which of the following must remain constant in a fair experiment?

What is the main function of the control group in an experiment?

Which statement best defines a scientific theory?

The Pacific Ring of Fire is best known for its:

Which of the following refers to the natural shaking of the ground due to movements beneath the Earth’s crust?

What property of a mineral is measured by its ability to transmit light?

Which type of cloud is typically associated with fair weather?

Which instrument is used to measure changes in atmospheric pressure?

What process provides the energy that drives the water cycle, especially evaporation?

Which environmental issue is directly caused by massive deforestation?

According to Mohs scale of hardness, which of the following is the hardest mineral?

What layer of the atmosphere is primarily responsible for protecting life on Earth by absorbing harmful ultraviolet radiation?

Which among the following gases is a major contributor to the greenhouse effect?

The movement of tectonic plates is driven by:

Which of the following best describes an ecosystem?

What is the main cause of tides on Earth?

Which of the following is a nonrenewable resource?

Which type of weather front brings sudden thunderstorms followed by cooler temperatures?

A student notices that rainwater from the roof flows into the same canal repeatedly. This observation best illustrates which scientific process?

The most reliable source of scientific knowledge is:

The primary purpose of using a graduated cylinder in an experiment is to:

Which best describes the importance of replication in scientific investigations?

A student plants four seeds in different types of soil. What is the independent variable in this experiment?

What unit is commonly used to measure the intensity of earthquakes?

Which practice contributes most to the conservation of biodiversity?

Which of the following is an example of a physical change?

Which tool would best help a scientist identify unknown elements in a rock sample?

Which property of water makes it capable of dissolving many substances?

An area receives little rainfall and has high temperatures year-round. What type of biome is this?

What phase change occurs when water vapor turns into liquid droplets on a cold surface?

The human body gets most of its energy from which macronutrient?

What technology allows scientists to modify the genetic material of organisms for agricultural or medical use?

What is the safest action to take during an earthquake when indoors?

The process of water moving from plants to the atmosphere is called:

Which phenomenon is directly caused by the Earth's rotation?

Which of the following is the best example of renewable energy?

What is the benefit of using scientific models in instruction?

A balanced food web ensures:

Which of the following is an effect of the El Niño phenomenon in the Philippines?

Which factor is least important in the formation of soil?

Which scientific attitude is shown when a scientist continues testing a hypothesis despite repeated failures?