1. a reliable experiment can have 2 or 3 independent variables
true or false

Plz will mark! the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?

Babies with very low or very high birth weight are less likely to survive. observe a graph of the data.