Pulsars
A pulsar is a highly magnetized, rotating neutron star that emits beams of electromagnetic radiation out of its magnetic poles. These beams of radiation can be observed as regular pulses of light as the pulsar rotates, hence the name "pulsar". Pulsars were first discovered in 1967 by astrophysicist Jocelyn Bell Burnell and her advisor Antony Hewish.
Characteristics of Pulsars:
- Rotation: Pulsars rotate at very high speeds, often ranging from milliseconds to a few seconds per rotation.
- Magnetic Field: Pulsars have extremely strong magnetic fields, which can be up to a billion times stronger than the strongest man-made magnets.
- Radio Waves: Pulsars emit radio waves, but they can also emit X-rays, gamma rays, and visible light.
- Pulse Period: The period of pulsars, or the time between each pulse, is incredibly regular and precise, making them useful for various scientific applications.
Formation of Pulsars:
Pulsars are formed from the remnants of massive stars that have gone supernova. When a massive star exhausts its nuclear fuel, it collapses under its own gravity, leading to the formation of a neutron star. If the neutron star is spinning rapidly and has a strong magnetic field, it can become a pulsar.
Study Guide:
- What is a pulsar?
- Who discovered the first pulsar and in what year?
- What are the characteristics of pulsars?
- How are pulsars formed?
- What scientific applications are pulsars useful for?
Hope this study guide helps you understand and learn more about pulsars!
.◂Science Worksheets and Study Guides Fourth Grade. Classifying organisms
Study Guide
Classifying organisms 
Worksheet/Answer key
Classifying organisms Worksheet/Answer key
Classifying organisms Worksheet/Answer key
Classifying organisms Vocabulary/Answer key
Classifying organisms Vocabulary/Answer key
Classifying organisms Vocabulary/Answer key
Classifying organisms Vocabulary/Answer key
Classifying organisms
Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
The Living Environment: Students understand that cells are the basic unit of life, that all life as we know it has evolved through genetic transfer and natural selection to create a great diversity of organisms, and that these organisms create interdependent webs through which matter and energy flow. Students understand similarities and differences between humans and other organisms and the interconnections of these interdependent webs.
Biodiversity: Students compare living things based on their behaviors, external features, and environmental needs.
Describe how living things can be sorted in many ways, depending on which features or behaviors are used to sort them, and apply this understanding to sort living things.