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Which statement about the structure of an atom is true?
chemical change
physical change
Electrons are not found in the atomic nucleus.
The woodpecker uses its beak to drill holes in trees to find insects to eat.
digestion of food
The interior of the marshmallow melts.
lungs
An electron ‘cloud’ surrounds each atom.
All woodpeckers have strong, chisel-like beaks designed for tapping on trees. What is the most likely reason that the woodpecker’s beak represents a successful adaptation?
chemical change
physical change
Electrons are not found in the atomic nucleus.
The woodpecker uses its beak to drill holes in trees to find insects to eat.
digestion of food
The interior of the marshmallow melts.
lungs
An electron ‘cloud’ surrounds each atom.
Which statement about the structure of an atom is true?
chemical change
physical change
Electrons are not found in the atomic nucleus.
The woodpecker uses its beak to drill holes in trees to find insects to eat.
digestion of food
The interior of the marshmallow melts.
lungs
An electron ‘cloud’ surrounds each atom.
Which of these best defines what happens when limestone rock reacts with acidic water?
chemical change
physical change
Electrons are not found in the atomic nucleus.
The woodpecker uses its beak to drill holes in trees to find insects to eat.
digestion of food
The interior of the marshmallow melts.
lungs
An electron ‘cloud’ surrounds each atom.
Water in the cracks of rocks freezes and expands when the temperature drops below freezing, and melts when the temperature rises above freezing. Over ext
chemical change
physical change
Electrons are not found in the atomic nucleus.
The woodpecker uses its beak to drill holes in trees to find insects to eat.
digestion of food
The interior of the marshmallow melts.
lungs
An electron ‘cloud’ surrounds each atom.
Eva toasts a marshmallow over a fire. Which of these is not evidence that a chemical change has occurred?
chemical change
physical change
Electrons are not found in the atomic nucleus.
The woodpecker uses its beak to drill holes in trees to find insects to eat.
digestion of food
The interior of the marshmallow melts.
lungs
An electron ‘cloud’ surrounds each atom.
Your body has organs that help you breathe. These organs make up the respiratory system. What is one part of the respiratory system?
chemical change
physical change
Electrons are not found in the atomic nucleus.
The woodpecker uses its beak to drill holes in trees to find insects to eat.
digestion of food
The interior of the marshmallow melts.
lungs
An electron ‘cloud’ surrounds each atom.
Which is an example of a chemical change?
chemical change
physical change
Electrons are not found in the atomic nucleus.
The woodpecker uses its beak to drill holes in trees to find insects to eat.
digestion of food
The interior of the marshmallow melts.
lungs
An electron ‘cloud’ surrounds each atom.
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