A car travels at 500 meters in ten seconds, what is the speed of the car?

How long would it take the bus to travel two hundred meters if it was moving at a speed of twenty meters per minute?

A car travels at a constant speed of twenty meters per second. How far will the car travel in thirty seconds?

A snail is crawling in a straight line at a speed of 15cm/s. how far will the snail travel in 45 seconds?

The groups of stars that form distinct pattern in the sky are called _____________.

The ___________________ is determined by the different position of earth, the moon, and the sun.

When one or two living things produce their offspring, they are involved in a process called ____________________

_______________ takes place when a sperm cell unites with the egg cell

When organisms of the same kind live together ,they form a group called

An _______ is an ecosystem formed where a river enters the ocean in such a way that there is a significant mixing of fresh water and seawater.

A _________ is any stationary object that can be used to described the change of position of the object.  

The rate at which an object moves in a direction is ___________.

According to International Astronomical Union (IAU), how many official constellations are there? 

It is the largest constellation in the sky.