Grade 4 Discover : Set 8 Copy
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Scientists have discovered that for more than half of the Earth’s 4.6 billion year history, oxygen (the gas that animals need to breathe) was not present in the environment.
An event called The Great Oxidation changed all this!
The Great Oxidation was started by a type of tiny organism that learned a skill that almost all plants know today!
What is this skill that plants use to make food?
Which process lets out oxygen?
Shown here is one way that plants store excess food that they have made.
Part of the ginger family of plants, the underground stem of this plant gives us a bright yellow powder that is used in cooking.
This powder has been used as a dye and is, even today, a part of multiple home-remedies.
By what name do we know this plant? Or what is the product that humans make from its underground stem?CorrectIncorrect
What is yellow in your kitchen?
Whales have blowholes on the top of their heads for the purpose of breathing.
Humans also have noses, nostrils, and the mouth to inhale and exhale.
Plants have special pores that allow them to take in carbon dioxide and release oxygen.
Found on the underside of most leaves, what are these pores called?CorrectIncorrect
Plants and trees store the extra food they make in different organs like the flower, the roots, stem, etc.
This plant, whose flower and stalk we eat, is from the cabbage family!
Also known to have several unique health benefits, what plant/vegetable are we talking about?
Not very liked among Kids!
Each individual leaf, known as a leaf blade, has a system of veins that transports water and nutrients to all parts of the leaf.
Humans also have a system of veins that carry a crucial element of life from all around the body back to the heart!
What is the function of human veins?CorrectIncorrect
The Veins carry ___ From the heart.