. Observe the document then answer the following questions. All liquids / fluids on the Speed of reaction / % Activity of the enzyme
universe & inside our
Pepsin Salivary
Trypsin
bodies have a specific
Amylase
acidity value which is
known as PH value.
Agrade 9 student has the
following two wonderings:
PHS
Hypothesis -1: Enzyme
acts at Any PH.
Hypothesis -2: Enzyme
acts at a specific range of
More Acidic
PH.
Several measurements were done on three different enzymes to verify one of the two hypotheses.
a- Indicate the objective (aim) of such measurements.

Identify the terms using the following picture. principle of dominance item 1 can be described as the . item 2 can be described as the . the "p" represents from one parent.

Identify characteristics of energy from the sun. check all that apply. almost all of the energy on earth comes from the sun. energy from the sun is known as mechanical energy. the energy in fossil fuels originally came from the sun. plants convert the energy of sunlight into chemical energy.

20 point pls brianliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?