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Showing: Class 5 / Science (322 questions)
Which part of the brain is mainly responsible for regulating heart rate and breathing?
When an astronaut stays in space for a long time, what shape does the heart become more like?
Which lever is shown in the picture?
The rate at which water can pass through soil particles is called _____.
What is the state of material deep below the Earth's surface?
Why is a sharp knife a more effective 'wedge' than a blunt knife?