Kai and Mason are building a model of a water molecule. They notice that the atoms in the molecule are held together by sharing electron pairs. What type of bond is this?

James is helping his younger sibling with a science project. He explains that the unique identity of each element on the periodic table is determined by a specific subatomic particle. Which subatomic particle is James referring to?

Michael is packing identical boxes with apples. He starts with a certain number of apples and wants to make sure that after packing, the number of apples in all the boxes combined is the same as the number he started with. In this scenario, the number of apples before and after packing must be:

During a cold evening, Priya lights a campfire and feels warmth coming from the flames. Which of the following best describes what is happening in this situation?

Hannah is baking bread and learns that adding yeast helps the dough rise faster because it contains enzymes. What is the role of enzymes in this process?

Aria is learning about how plants make their own food. She wonders which part of the plant cell is responsible for photosynthesis. Where does photosynthesis occur?

Scarlett is helping her teacher set up a science experiment with plants. She learns that during photosynthesis, plants absorb a certain gas from the air. What gas do plants absorb during photosynthesis?

Avery is running a marathon and needs energy to keep going. How does cellular respiration benefit Avery during the race?

Charlotte is studying biology and wants to understand which macromolecule in our cells is most involved in storing genetic information. Which macromolecule should she focus on?

Zoe is pushing a shopping cart at the grocery store. The harder she pushes, the faster the cart accelerates. Which law explains this relationship?

Arjun is running in a park and wants to know more about his movement. Which of the following quantities that he can measure is a vector quantity?

Priya is conducting an experiment in her science class. She wants to know which type of wave needs air or another material to travel from one place to another. Which type of wave requires a medium to travel?

Noah is curious about what causes the weather patterns he sees every day, like rain, wind, and sunshine. What is the primary source of energy driving Earth’s weather systems?

Emma notices that the weather changes throughout the year, with warmer summers and colder winters. She wonders what causes these seasonal changes on Earth. What is the main reason for the seasons?

Jackson notices that in a population of rabbits, those with white fur are better camouflaged in snowy environments and are less likely to be caught by predators. Over time, more white-furred rabbits survive and reproduce. Which of the following best explains this situation?

Elijah is learning about cells in his biology class. He wants to know which structure in a cell contains DNA. Which one should he choose?

Henry and Luna want to know the chances of their child inheriting a certain genetic trait. What tool can they use to predict this probability?

Kai visits a national park and observes many different plants, animals, and microorganisms living together. What is this variety of life in the ecosystem called?

In a local lake, a new species of fish is introduced from another country. Over time, what is a likely effect of this invasive species on the lake's ecosystem?

Abigail notices that her car gets much hotter inside when parked in the sun with the windows closed. Which best describes why this happens?

Nora is learning about different types of energy sources in her science class. Her teacher asks her to identify which of the following is a renewable resource. What should Nora choose?

Arjun is curious about what causes the giant pieces of Earth's crust to slowly move and sometimes collide, creating mountains and earthquakes. What drives the movement of these tectonic plates?

Kai is learning about how rocks change over time. Which best describes the rock cycle?

Luna is helping her younger brother with his geology homework. She asks him, "Do you know which process forms sedimentary rock?"

Sophia checks the weather forecast every morning to decide what to wear, while her teacher talks about the climate of their city over the past 30 years. How is weather different from climate?

Nora is studying the effects of climate change on coastal cities. She wants to know what can cause sea level rise. What should she consider?

David is learning about the carbon cycle in his science class. He wants to know which process releases carbon into the atmosphere. Which process should he choose?

James and Aria want to invent a new type of backpack for students. What is the first step they should take in the engineering design process?

James is working on a new product design for his company. He has many ideas, but he needs to consider certain limitations. What is an example of a constraint in design?

Grace is trying to understand how weather patterns work, but the real atmosphere is very complex. Why might using models be helpful for Grace in her scientific study?

Daniel is observing different activities in his kitchen. Which of the following is an example of a chemical change?

Mason is curious about how plants in his garden are able to grow and provide food for animals and humans. Which process provides energy for most life on Earth?

In a forest, fallen leaves and dead animals are left on the ground. What role do decomposers play in this ecosystem?

Sophia visits a hospital for a routine check-up, and the doctor recommends an imaging test to view her internal organs without surgery. Which type of wave is used in this medical imaging procedure?

Zoe notices that when she turns on a lamp, the electrical energy changes into light and heat. Which statement about energy is true?

Liam is working on a science project where he needs to explain what happens when a cell prepares to divide. Which best describes what happens to the cell's DNA during this process?

While visiting a natural history museum, Isla notices displays of fossils from many different time periods. What does this fossil record provide evidence for?

Jackson is building a model of the Earth for his science project. He wants to know which layer of the Earth is the thinnest so he can make his model accurate. Which Earth layer is the thinnest?

Arjun places a burning candle inside a sealed glass jar. Which of these best models the conservation of mass?

Liam is learning about how his body works. He wonders which system in his body is responsible for transporting oxygen. What is the function of the circulatory system?

On a cool morning, Harper notices tiny droplets forming on the outside of her cold water bottle. Which part of the water cycle is Harper observing, where water vapor cools and forms droplets?

Michael is studying a pond ecosystem and wants to identify which of the following is an abiotic factor. Which should he choose?

Aria is studying a population of birds in a forest. She notices that some birds have slightly different beak shapes, which helps them find food more easily during changes in the environment. What is genetic variation important for?

Priya eats a meal, and her body releases a hormone to help control her blood sugar levels. What’s an example of feedback in human body systems?

Priya is learning about how scientists explain natural phenomena. What best describes a scientific theory?