What types of substances tend to be alkaline or basic?

A pH of less than 7 indicates that the liquid is

A pH of g4reater than 7 indicates a liquid is

A pH of 7 indicates that a liquid is

Rainfall generally has a pH value between 5 and 6.5. It is acidic because of dissolved carbon dioxide and air pollutants, such as sulfur dioxide or nitrogen oxides. Heavy rains can change the pH of streams and rivers by

If rain water flows over soil containing hard-water minerals, such as limestone, the pH of the water will _____________________ producing pH values between 7 and 8.5.

The optimal pH level for fish and aquatic insects is between

Which foods contain high levels of starch?

Which foods are good sources of protein?

Which foods are good sources of fats?

Which foods are a good source of sugar?

Which two macronutrients are carbohydrates?

Assume that a barn owl forms one pellet each day and that your pellet represents an average of how much a barn owl eats each night. If an owl pellet contains 3 rodent skulls, how many animals would an owl eat in a week?

Many farmers like to have owls living on their farms. Why?

Like all birds of prey, owls are ___________________—they eat other

animals.

A _______________________ is a visual model that depicts how energy flows through organisms

in an ecosystem.

An ecosystem includes multiple food chains linked into a ______________ that includes several consumers(herbivores, carnivores, omnivores), producers (plants and other photosynthetic organisms), and decomposers (fungi, bacteria, and detritivores).

What is the source of the energy that goes into a food chain?

What can you learn about owls by dissecting owl pellets?

The flow of energy and matter into, through, and out of a system is called

In a ecosystem, abundant plants produce abundant rabbits. This is an example of

In a ecosystem, abundant rabbits produce few plants. This is an example of

Green plants are often called ________________ because they create carbohydrates and other compounds using sunlight,

Organism that gain their energy from the inorganic compounds, such as hydrogen sulfide, through the process of

Energy from the sun is converted by green plants into carbohydrates by a process called

Energy captured and stored in carbohydrates is released by the breaking of chemical bonds in a process called

Ninety percent of the energy from each trophic level is lost in the form of ______ as you move to the next level.

The damage to an ecosystem caused by a hurricane or flood can be referred to as