Astudent wants to compare the amount of co2 given off by yeast provided with different amounts of sugar. the student places a balloon over each container to catch the released co2 which observation is a qualitative observation the student can make

Why is retrograde motion an apparent motion

What is happening when the water inside a kettle heats up and begins to boil

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.