Delis cactus is the correct way to write it.
Walk out. If it's denser than air, it'll settle to the bottom
3. A
4.B
3.Since the Earth rotates through two tidal “bulges” every lunar day, we experience two high and two low tides every 24 hours and 50 minutes
4.An eclipse of the Sun happens when the New Moon moves between the Sun and Earth, blocking out the Sun's rays and casting a shadow on parts of Earth
The law of floatation states that, a floating body displaces its own weight of the fluid in which it floats.
