Human Body👀🫁
What protein in red blood cells carries oxygen?
Hemoglobin
What is the chemical symbol for gold?
Au
What galaxy contains our solar system?
The Milky Way
What is the largest animal alive today?
The Blue Whale
Mushrooms aren’t plants or animals. What kingdom do they belong to?
Fungi
What muscle beneath your lungs contracts when you inhale?
Diaphragm
A solution has a pH of 3. Is it acidic, neutral, or basic?
Acidic
What causes Earth’s seasons?
Earth’s axial tilt as it orbits the Sun
What is the only group of mammals capable of sustained flight?
Mammals
What tiny openings on leaves allow gases to move in and out?
Stomata
Which side of the heart pumps oxygenated blood to the rest of the body?
The left side
What gas makes up about 78% of Earth’s atmosphere?
Nitrogen
A light-year measures what: time, distance, or brightness?
Distance
How many hearts does an octopus have?
Three
A plant bends toward a window as it grows. What is this response to light called?
Phototropism
Which organ produces insulin, the hormone that helps regulate blood sugar?
The pancreas
What type of chemical bond involves atoms sharing electrons?
Why can astronauts float inside the International Space Station even though gravity still acts on them?
They and the station are continuously falling around Earth, in orbit.
Sharks have skeletons, but they aren’t made of bone. What are they made of?
Cartilage—the same flexible material found in your outer ears and nose
A tree gains hundreds of kilograms as it grows. Most of the carbon in its wood originally comes from what?
Carbon dioxide in the air
Your body gets hotter, so you sweat to cool down. Is this positive or negative feedback?
negative feedback
Diamond and graphite are different forms of which element?
Carbon
What process in the Sun’s core releases energy by combining hydrogen nuclei?
Nuclear fusion
A whale lives underwater but is classified as a mammal. Name TWO characteristics it shares with other mammals.
breathes air using lungs, produces milk for its young, is warm-blooded, has hair at some stage of life
Why does putting food in the fridge help it last longer?
Cold temperatures slow the growth of bacteria and other microorganisms that spoil food.