When you choose fruit at a supermarket you might heft the fruit in your hand to test its weight?

When you choose fruit at a supermarket you might heft the fruit in your hand to test its weight?

When you heft fruit for weight, you are estimating the mass. Since fruit are approximately the same size (same diameter means same volume), you are also comparing the density, which will be higher for fruit with more water inside because water is fairly dense compared to dry plant matter.

What is the theory of plate tectonics quizlet?

The plate tectonics theory suggested that Earth’s surface is divided into large plates of rigid rock. Each plate moves over Earth’s hot semi-plastic mantle. plate tectonics. The theory of plate tectonics states that Earth’s surface is made of rigid slabs of rock, or plates, that move with respect to each other.

What factors are thought to be responsible for the earth’s magnetic field quizlet?

The Earth’s magnetic field is believed to be generated by electric currents in the conductive material of its core, created by convection currents due to heat escaping from the core.

Which of Earth’s layers is broken into several large tectonic plates?

In plate tectonics, Earth’s outermost layer, or lithosphere—made up of the crust and upper mantle—is broken into large rocky plates.

How do you pick the right fruit?

How to Pick Ripe Fruit

1. Check the color. Color is often an important indicator of ripeness.
2. Squeeze the fruit. Some fruits, like apples should be firm, while others, like peaches, shouldn’t be as firm.
3. Check the stems.
4. Smell the fruit.
5. Look for the luster.

How do you pick good fruits and vegetables?

Tips for buying fruit and vegetables

1. Don’t buy produce that is bruised or damaged.
2. Before selecting, give produce a light squeeze.
3. Smell your fruit.
4. Choose smaller pieces of fruit.
5. Choose vibrant, colourful produce.
6. Buy produce seasonally.
7. Choose chilled food.
8. Compare the price.

What are the 3 theories of plate tectonics?

The three types of plate boundaries are divergent, convergent, and transform. They are described in the following three concepts. Most geological activity takes place at plate boundaries.

What is the basic idea of the theory of plate tectonics quizlet?

What is the basic premise of the plate tectonic theory? Plate tectonic theory states that the Earth’s crust is divided into several plates. These plates glide on the slowly moving rock on Earth’s surface.

What evidence indicates that part of Earth’s interior is liquid?

Seismic-Wave Data Both P waves and S waves can travel through solids, but the only P waves can travel through liquids. Seismic wave data shows that S waves do not pass through the outer core, and thus this part of the planet’s interior must be liquid.

What factors are thought to be responsible for the Earth’s magnetic field?

On Earth, flowing of liquid metal in the outer core of the planet generates electric currents. The rotation of Earth on its axis causes these electric currents to form a magnetic field which extends around the planet.

What are the 4 types of plate tectonics?

There are four types of boundaries between tectonic plates that are defined by the movement of the plates: divergent and convergent boundaries, transform fault boundaries, and plate boundary zones.

What causes the tectonic plates to move?

The plates can be thought of like pieces of a cracked shell that rest on the hot, molten rock of Earth’s mantle and fit snugly against one another. The heat from radioactive processes within the planet’s interior causes the plates to move, sometimes toward and sometimes away from each other.

When did scientists accept the theory of plate tectonics?

New York, 1987. Two scientific advances in the mid-20th Century resulted in information critical to acceptance of continental drift and plate tectonic theory. First, the topography of the ocean floor was mapped in great detail during and after World War II. It was discovered that the floors of the ocean basins are not flat.

How often do the plates move over the earth’s surface?

Movement of the plates over Earth’s surface is termed plate tectonics. Plates move at a rate of a few centimeters a year, about the same rate fingernails grow.

Why are seismic waves important to plate tectonics?

Finally, seismic waves slow down as they travel through a zone about 100 to 400 miles (150 to 700 kilometers) deep, a sign that there is a relatively soft layer within Earth’s mantle. This last observation is the “Rosetta Stone” for plate tectonic theory. It provides a means by which continents can drift apart.

What happens when two oceanic plates converge in the mantle?

Similar batholiths are likely forming beneath the Andes and Cascades today. When two oceanic plates converge, the older, denser plate will subduct into the mantle. An ocean trench marks the location where the plate is pushed down into the mantle. The line of volcanoes that grows on the upper oceanic plate is an island arc.