﻿ what apparatus can you use to measure the speed of photosynthesis?

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## the speed of the bubbles change.

Three factors can limit the speed of photosynthesis - light intensity, carbon dioxide concentration and temperature.

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# Speeding up the Rate of Photosynthesis :: Papers

. Each force acts on one particular object and has both a strength and a direction. An object at rest typically has multiple forces acting on it, but they add to give zero net force on the object. Forces that do not sum to zero can cause changes in the object’s speed or direction of motion. (Boundary: Qualitative and conceptual, but not quantitative addition of forces are used at this level.) The patterns of an object’s motion in various situations can be observed and measured; when past motion exhibits a regular pattern, future motion can be predicted from it. (Boundary: Technical terms, such as magnitude, velocity, momentum, and vector quantity, are not introduced at this level, but the concept that some quantities need both size and direction to be described is developed.)

Biologists have a new way to increase the size of crops by 20 per cent. They changed the thing in plants that is used in photosynthesis. Photosynthesis is the when plants use sunlight to change carbon dioxide into oxygen. This lets us breathe. The scientists found a way for plants to use the energy they get from sunlight better. Professor Stephen Long said his team is changing the genes in crops such as rice, wheat, maize and soybean.

## Why Does Gravity Travel at the Speed of Light? - D-brief

When placed in sufficient light, the photosynthetic processes then produce oxygen bubbles that change the buoyancy of the disk, eventually causing them to rise.

Without enough light, a plant cannot photosynthesise very quickly, even if there is plenty of water and carbon dioxide. Increasing the light intensity will boost the speed of photosynthesis.

## Studies on the Effect of Wind Speed on Photosynthesis (3)

At the macroscale, the motion of an object subject to forces is governed by Newton’s second law of motion. Under everyday circumstances, the mathematical expression of this law in the form = (total force = mass times acceleration) accurately predicts changes in the motion of a single macroscopic object of a given mass due to the total force on it. But at speeds close to the speed of light, the second law is not applicable without modification. Nor does it apply to objects at the molecular, atomic, and subatomic scales, or to an object whose mass is changing at the same time as its speed.

For speeds that are small compared with the speed of light, the momentum of an object is defined as its mass times its velocity. For any system of interacting objects, the total momentum within the system changes only due to transfer of momentum into or out of the system, either because of external forces acting on the system or because of matter flows. Within an isolated system of interacting objects, any change in momentum of one object is balanced by an equal and oppositely directed change in the total momentum of the other objects. Thus total momentum is a conserved quantity.

• ### How does carbon affect photosynthesis

results of a lab which tests how changing the level of carbon dioxide can change the rate (speed) of photosynthesis

• ### Measuring the rate of photosynthesis - Science and …

On Jan 1, 1973 Kazutoshi YABUKI (and others) published: Studies on the Effect of Wind Speed on Photosynthesis (3)

• ### BBC - GCSE Bitesize: Factors limiting photosynthesis

19/11/2012 · Discuss the effect of global climate change on photosynthesis

## Measuring the Rate of Photosynthesis | Photosynthesis …

Not only is evolution happening right now everywhere around us, but adaptive changes can occur in a population with remarkable speed. This speed is essential if you’re a desert mouse living in an environment where a volcanic eruption can reverse selective pressure in nearly an instant. The film features Dr. Michael Nachman, whose work in the field and in the lab has quantified the selective pressure of predators and identified the genes involved in adaptation. In a complete story, from ecosystem to molecules, pocket mice show us how random changes in the genome can take many paths to the same adaptation—a colored coat that hides them from predators.

## Measuring the Rate of Photosynthesis ..

Biologists have increased the size of crops by 20 per cent. They changed the how plants use photosynthesis. This is when plants use sunlight to change carbon dioxide into oxygen. The new plants use the energy from sunlight better. A professor said he is changing crops like rice, wheat, maize and soybean.

## MEASURING THE RATE OF PHOTOSYNTHESIS

. Objects pull or push each other when they collide or are connected. Pushes and pulls can have different strengths and directions. Pushing or pulling on an object can change the speed or direction of its motion and can start or stop it. An object sliding on a surface or sitting on a slope experiences a pull due to friction on the object due to the surface that opposes the object’s motion.

## Factors Affecting The Rate Of Photosynthesis - …

In its simpler form, this experiment is particularly suited to elementary schools.
1 - Put some beans in a little jar containing some moist cotton wool. Keep the jar closedto maintain the humidity. Every day pull out the cotton and observe the state of the seedsand measure the length of their roots.
2 - Students in junior high schools or high schools can try to evaluate the influence ofparameters such as temperature, light and nutrients on the speed of germination of theseeds. If seeds are placed in gelatin, it is possible to observe the germination withoutextracting them from the jar.
3 - You can also collect seeds of different plants and determine their vitality (percentof seeds which germinate) as a function of time to harvest.
Exploring Seed Germination
Germinating Seeds on Gelatin
The Great Seed Mystery For Kids
The Wonderful World of Seeds
Internet keywords: germination seeds student.

## I will be changing the levels of ..

Newton’s second law accurately predicts changes in the motion of macroscopic objects, but it requires revision for subatomic scales or for speeds close to the speed of light. (Boundary: No details of quantum physics or relativity are included at this grade level.)

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