1) a star burst can be defined as stars formed from recycled dead star materials.
true or false

2) when the milky way was in its earliest ages, hydrogen, helium and other common elements were the only ones around.
true or false

3) to estimate the milky way’s age, astronomers measure the elements found in the oldest stars in the milky way’s dense groupings of stars that make the halo shape, which are referred to as what?
1-pulsar planets
2-star bursts
3-brown dwarfs
4-global clusters

What is magnetic flux? explain faraday's law of induction.

How are series and parallel circuits simililar? both have multiple paths for electrons to travel. both require resistors in their circuits. both require a switch to complete the circuit. both have at least one path for electrons to travel.

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.