Mars is called the Red Planet because its soil contains iron oxide, which gives it a reddish colour. Why is Mars called the Red Planet?
- AIt has red oceans.
- BIt is very close to the sun.
- CIt has two small red moons.
- DIts soil contains iron oxide.
Mars is called the Red Planet because its soil contains iron oxide, which gives it a reddish colour. Why is Mars called the Red Planet?
Blood contains several kinds of cells. Red blood cells carry oxygen around the body. White blood cells help fight infection. Platelets help the blood to clot when you are cut. Which cells help fight infection?
Mia set her alarm for 6 a.m. After she woke up, she showered and ate breakfast. Then she packed her bag and caught the bus to school. What did Mia do right after she ate breakfast?
Octopuses can change the colour and texture of their skin in less than a second. They use this ability to hide from predators and to sneak up on prey. What are two reasons octopuses change colour?
“Unlike email, which can be read at any time, a phone call needs both people to be available at once.” What difference does the sentence describe?
“Ella stared at the empty page. The essay was due in an hour, and she had written only her name.” How does Ella most likely feel?
“Ten patients tried a new sleep app. Eight said they slept better. The app company now claims: ‘Proven to cure insomnia!’” Why is the claim not justified?
The author writes: “Many people skip the flu vaccine because they believe it can give them the flu. The injected vaccine contains no live virus, so it cannot cause the illness. Mild soreness or a low temperature for a day is a normal sign that the body is building protection.” What is the purpose of the last sentence?
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