You and your friend live in different states and plant identical hydrangea bulbs in your garden. When they bloom, you send each other pictures. You notice that even though you bought the exact same kind of plant, your hydrangea flowers are blue and your friend’s are pink! On a hunch, you each measure the pH of your soil and find that your soil is a little acidic and your friend’s is a little basic. Why do you think the flowers have different colors?
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Since the hydrangeas are changing color depending on whether the soil is acidic or basic, they must have an indicator. This means that any hydrangea planted in acidic soil will have blue flowers and any hydrangea planted in basic soil will have pink. One common indicator present in many plants is anthocyanin, so maybe hydrangeas contain that chemical.
I think the soil has a lot to do with the reason why the flowers have different colors.
Soil
A soil is a mixture of organic matter that supports life. There are 4 types of soil which are sand, silt., clay and loam soil.
A hydrangea flower is affected by the acidity of the soil to influence the color it turns out to be.
The acidic property in the soil used to plant the flower turned it blue,
while The alkaline property in the soil turned the color pink.
Learn more about soil here:
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Answer: 75 C
Explanation:
Question 7 options:
Their speeds are the same.
the object with the greater speed has greater kinetic energy
the object greater speed has the lower kinetic energy
the object with the smaller mass has the greater kinetic energy
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Answer: Option (B) is the correct answer.
Explanation:
Kinetic energy is the energy due to the motion of an object.
Mathematically, K.E =
where m = mass
v = velocity
Therefore, an object whose velocity is more will have more kinetic energy.
Thus, we can conclude that out of the given options, the object with the greater speed has greater kinetic energy is true about their kinetic energy.
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The chemical changes that occur as a car ages are fading of paint due to sunlight. rusting on the chrome, corrosion of electrical wiring. Some physical changes that occur as a car ages are breaking of the handles and straps, wearing down of tyre, paint scratches.
A chemical change is one which brings change in the composition of the substance. In other words, it is such a change which forms a completely new substance or product. It is an irreversible change.
On the other hand, a physical change is one which brings structural change or change in appearance of a substance without changing its original composition. It is a reversible change.
To know more about chemical change here
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Answer:physical: a part falling off or changing a tire. chemical:rust
Explanation:
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Electrical Energy ____________________ Heat Energy
Light Energy
Mechanical Energy
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Chemical Energy
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Answer: Mechanical Energy
Explanation:
According of law of conservation of energy, energy can neither be created nor be destroyed. It can only transformed from one form to another.
When electric sharpener works by using electrical energy, it is being used to drive the blades of the sharpener and is being converted to mechanical energy which is then converted to heat energy and the sharpener gets warm.
Electrical energy is the energy possessed by virtue of motion of electrons.
Mechanical energy is the energy possessed by a body by virtue of its position and motion.
Heat energy is the transfer of thermal energy from hotter body to colder body.
first the pencil sharpener gets electricity from the plug and wires
that then makes the pencil sharpener move it's motor and well, sharpen pencils
all the kinetic energy from the motor moving releases heat, making the sharpener warm